//package com.zb.maclearn.source;
//
///*
// * Copyright (C) 2006 The Android Open Source Project
// *
// * Licensed under the Apache License, Version 2.0 (the "License");
// * you may not use this file except in compliance with the License.
// * You may obtain a copy of the License at
// *
// *      http://www.apache.org/licenses/LICENSE-2.0
// *
// * Unless required by applicable law or agreed to in writing, software
// * distributed under the License is distributed on an "AS IS" BASIS,
// * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// * See the License for the specific language governing permissions and
// * limitations under the License.
// */
//
//import static android.os.Build.VERSION_CODES.JELLY_BEAN_MR1;
//import static android.view.WindowInsetsAnimation.Callback.DISPATCH_MODE_CONTINUE_ON_SUBTREE;
//import static android.view.WindowInsetsAnimation.Callback.DISPATCH_MODE_STOP;
//
//import android.animation.LayoutTransition;
//import android.annotation.CallSuper;
//import android.annotation.IdRes;
//import android.annotation.NonNull;
//import android.annotation.Nullable;
//import android.annotation.TestApi;
//import android.annotation.UiThread;
//import android.compat.annotation.UnsupportedAppUsage;
//import android.content.ClipData;
//import android.content.Context;
//import android.content.Intent;
//import android.content.pm.PackageManager;
//import android.content.res.Configuration;
//import android.content.res.TypedArray;
//import android.graphics.Bitmap;
//import android.graphics.Canvas;
//import android.graphics.Color;
//import android.graphics.Insets;
//import android.graphics.Matrix;
//import android.graphics.Paint;
//import android.graphics.Point;
//import android.graphics.PointF;
//import android.graphics.Rect;
//import android.graphics.RectF;
//import android.graphics.Region;
//import android.os.Build;
//import android.os.Bundle;
//import android.os.Parcelable;
//import android.os.SystemClock;
//import android.util.AttributeSet;
//import android.util.Log;
//import android.util.Pools;
//import android.util.Pools.SynchronizedPool;
//import android.util.SparseArray;
//import android.util.SparseBooleanArray;
//import android.view.ActionMode;
//import android.view.Display;
//import android.view.DragEvent;
//import android.view.FocusFinder;
//import android.view.InputDevice;
//import android.view.KeyEvent;
//import android.view.Menu;
//import android.view.MenuInflater;
//import android.view.MotionEvent;
//import android.view.PixelCopy;
//import android.view.PointerIcon;
//import android.view.SurfaceView;
//import android.view.TextureView;
//import android.view.View;
//import android.view.ViewDebug;
//import android.view.ViewGroupOverlay;
//import android.view.ViewManager;
//import android.view.ViewOutlineProvider;
//import android.view.ViewOverlay;
//import android.view.ViewParent;
//import android.view.ViewStructure;
//import android.view.WindowInsets;
//import android.view.WindowInsetsAnimation;
//import android.view.WindowInsetsAnimation.Bounds;
//import android.view.WindowInsetsAnimation.Callback.DispatchMode;
//import android.view.accessibility.AccessibilityEvent;
//import android.view.accessibility.AccessibilityManager;
//import android.view.accessibility.AccessibilityNodeInfo;
//import android.view.animation.Animation;
//import android.view.animation.AnimationUtils;
//import android.view.animation.LayoutAnimationController;
//import android.view.animation.Transformation;
//import android.view.autofill.Helper;
//import android.view.inspector.InspectableProperty;
//import android.view.inspector.InspectableProperty.EnumEntry;
//
//import com.android.internal.R;
//
//import java.util.ArrayList;
//import java.util.Collection;
//import java.util.Collections;
//import java.util.HashSet;
//import java.util.List;
//import java.util.Map;
//import java.util.Queue;
//import java.util.function.Predicate;
//
///**
// * <p>
// * A <code>ViewGroup</code> is a special view that can contain other views
// * (called children.) The view group is the base class for layouts and views
// * containers. This class also defines the
// * {@link android.view.ViewGroup.LayoutParams} class which serves as the base
// * class for layouts parameters.
// * </p>
// *
// * <p>
// * Also see {@link android.view.ViewGroup.LayoutParams} for layout attributes.
// * </p>
// *
// * <div class="special reference">
// * <h3>Developer Guides</h3>
// * <p>For more information about creating user interface layouts, read the
// * <a href="{@docRoot}guide/topics/ui/declaring-layout.html">XML Layouts</a> developer
// * guide.</p></div>
// *
// * <p>Here is a complete implementation of a custom ViewGroup that implements
// * a simple {@link android.widget.FrameLayout} along with the ability to stack
// * children in left and right gutters.</p>
// *
// * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/CustomLayout.java
// *      Complete}
// *
// * <p>If you are implementing XML layout attributes as shown in the example, this is the
// * corresponding definition for them that would go in <code>res/values/attrs.xml</code>:</p>
// *
// * {@sample development/samples/ApiDemos/res/values/attrs.xml CustomLayout}
// *
// * <p>Finally the layout manager can be used in an XML layout like so:</p>
// *
// * {@sample development/samples/ApiDemos/res/layout/custom_layout.xml Complete}
// *
// * @attr ref android.R.styleable#ViewGroup_clipChildren
// * @attr ref android.R.styleable#ViewGroup_clipToPadding
// * @attr ref android.R.styleable#ViewGroup_layoutAnimation
// * @attr ref android.R.styleable#ViewGroup_animationCache
// * @attr ref android.R.styleable#ViewGroup_persistentDrawingCache
// * @attr ref android.R.styleable#ViewGroup_alwaysDrawnWithCache
// * @attr ref android.R.styleable#ViewGroup_addStatesFromChildren
// * @attr ref android.R.styleable#ViewGroup_descendantFocusability
// * @attr ref android.R.styleable#ViewGroup_animateLayoutChanges
// * @attr ref android.R.styleable#ViewGroup_splitMotionEvents
// * @attr ref android.R.styleable#ViewGroup_layoutMode
// */
//@UiThread
//public abstract class ViewGroup extends View implements ViewParent, ViewManager {
//    private static final String TAG = "ViewGroup";
//
//    @UnsupportedAppUsage
//    private static final boolean DBG = false;
//
//    /**
//     * Views which have been hidden or removed which need to be animated on
//     * their way out.
//     * This field should be made private, so it is hidden from the SDK.
//     * {@hide}
//     */
//    @UnsupportedAppUsage
//    protected ArrayList<View> mDisappearingChildren;
//
//    /**
//     * Listener used to propagate events indicating when children are added
//     * and/or removed from a view group.
//     * This field should be made private, so it is hidden from the SDK.
//     * {@hide}
//     */
//    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 123768704)
//    protected android.view.ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener;
//
//    // The view contained within this ViewGroup that has or contains focus.
//    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
//    private View mFocused;
//    // The view contained within this ViewGroup (excluding nested keyboard navigation clusters)
//    // that is or contains a default-focus view.
//    private View mDefaultFocus;
//    // The last child of this ViewGroup which held focus within the current cluster
//    View mFocusedInCluster;
//
//    /**
//     * A Transformation used when drawing children, to
//     * apply on the child being drawn.
//     */
//    private Transformation mChildTransformation;
//
//    /**
//     * Used to track the current invalidation region.
//     */
//    RectF mInvalidateRegion;
//
//    /**
//     * A Transformation used to calculate a correct
//     * invalidation area when the application is autoscaled.
//     */
//    Transformation mInvalidationTransformation;
//
//    // Current frontmost child that can accept drag and lies under the drag location.
//    // Used only to generate ENTER/EXIT events for pre-Nougat aps.
//    private View mCurrentDragChild;
//
//    // Metadata about the ongoing drag
//    private DragEvent mCurrentDragStartEvent;
//    private boolean mIsInterestedInDrag;
//    private HashSet<View> mChildrenInterestedInDrag;
//
//    // Used during drag dispatch
//    private PointF mLocalPoint;
//
//    // Lazily-created holder for point computations.
//    private float[] mTempPosition;
//
//    // Lazily-created holder for point computations.
//    private Point mTempPoint;
//
//    // Lazily created Rect for dispatch to children
//    private Rect mTempRect;
//
//    // Lazily created int[2] for dispatch to children
//    private int[] mTempLocation;
//
//    // Layout animation
//    private LayoutAnimationController mLayoutAnimationController;
//    private Animation.AnimationListener mAnimationListener;
//
//    // First touch target in the linked list of touch targets.
//    @UnsupportedAppUsage
//    private TouchTarget mFirstTouchTarget;
//
//    // For debugging only.  You can see these in hierarchyviewer.
//    @SuppressWarnings({"FieldCanBeLocal", "UnusedDeclaration"})
//    @ViewDebug.ExportedProperty(category = "events")
//    private long mLastTouchDownTime;
//    @ViewDebug.ExportedProperty(category = "events")
//    private int mLastTouchDownIndex = -1;
//    @SuppressWarnings({"FieldCanBeLocal", "UnusedDeclaration"})
//    @ViewDebug.ExportedProperty(category = "events")
//    private float mLastTouchDownX;
//    @SuppressWarnings({"FieldCanBeLocal", "UnusedDeclaration"})
//    @ViewDebug.ExportedProperty(category = "events")
//    private float mLastTouchDownY;
//
//    // First hover target in the linked list of hover targets.
//    // The hover targets are children which have received ACTION_HOVER_ENTER.
//    // They might not have actually handled the hover event, but we will
//    // continue sending hover events to them as long as the pointer remains over
//    // their bounds and the view group does not intercept hover.
//    private HoverTarget mFirstHoverTarget;
//
//    // True if the view group itself received a hover event.
//    // It might not have actually handled the hover event.
//    private boolean mHoveredSelf;
//
//    // The child capable of showing a tooltip and currently under the pointer.
//    private View mTooltipHoverTarget;
//
//    // True if the view group is capable of showing a tooltip and the pointer is directly
//    // over the view group but not one of its child views.
//    private boolean mTooltipHoveredSelf;
//
//    /**
//     * Internal flags.
//     *
//     * This field should be made private, so it is hidden from the SDK.
//     * {@hide}
//     */
//    @ViewDebug.ExportedProperty(flagMapping = {
//            @ViewDebug.FlagToString(mask = FLAG_CLIP_CHILDREN, equals = FLAG_CLIP_CHILDREN,
//                    name = "CLIP_CHILDREN"),
//            @ViewDebug.FlagToString(mask = FLAG_CLIP_TO_PADDING, equals = FLAG_CLIP_TO_PADDING,
//                    name = "CLIP_TO_PADDING"),
//            @ViewDebug.FlagToString(mask = FLAG_PADDING_NOT_NULL, equals = FLAG_PADDING_NOT_NULL,
//                    name = "PADDING_NOT_NULL")
//    }, formatToHexString = true)
//    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 123769411)
//    protected int mGroupFlags;
//
//    /**
//     * Either {@link #LAYOUT_MODE_CLIP_BOUNDS} or {@link #LAYOUT_MODE_OPTICAL_BOUNDS}.
//     */
//    private int mLayoutMode = LAYOUT_MODE_UNDEFINED;
//
//    /**
//     * NOTE: If you change the flags below make sure to reflect the changes
//     *       the DisplayList class
//     */
//
//    // When set, ViewGroup invalidates only the child's rectangle
//    // Set by default
//    static final int FLAG_CLIP_CHILDREN = 0x1;
//
//    // When set, ViewGroup excludes the padding area from the invalidate rectangle
//    // Set by default
//    private static final int FLAG_CLIP_TO_PADDING = 0x2;
//
//    // When set, dispatchDraw() will invoke invalidate(); this is set by drawChild() when
//    // a child needs to be invalidated and FLAG_OPTIMIZE_INVALIDATE is set
//    static final int FLAG_INVALIDATE_REQUIRED  = 0x4;
//
//    // When set, dispatchDraw() will run the layout animation and unset the flag
//    private static final int FLAG_RUN_ANIMATION = 0x8;
//
//    // When set, there is either no layout animation on the ViewGroup or the layout
//    // animation is over
//    // Set by default
//    static final int FLAG_ANIMATION_DONE = 0x10;
//
//    // If set, this ViewGroup has padding; if unset there is no padding and we don't need
//    // to clip it, even if FLAG_CLIP_TO_PADDING is set
//    private static final int FLAG_PADDING_NOT_NULL = 0x20;
//
//    /** @deprecated - functionality removed */
//    @Deprecated
//    private static final int FLAG_ANIMATION_CACHE = 0x40;
//
//    // When set, this ViewGroup converts calls to invalidate(Rect) to invalidate() during a
//    // layout animation; this avoid clobbering the hierarchy
//    // Automatically set when the layout animation starts, depending on the animation's
//    // characteristics
//    static final int FLAG_OPTIMIZE_INVALIDATE = 0x80;
//
//    // When set, the next call to drawChild() will clear mChildTransformation's matrix
//    static final int FLAG_CLEAR_TRANSFORMATION = 0x100;
//
//    // When set, this ViewGroup invokes mAnimationListener.onAnimationEnd() and removes
//    // the children's Bitmap caches if necessary
//    // This flag is set when the layout animation is over (after FLAG_ANIMATION_DONE is set)
//    private static final int FLAG_NOTIFY_ANIMATION_LISTENER = 0x200;
//
//    /**
//     * When set, the drawing method will call {@link #getChildDrawingOrder(int, int)}
//     * to get the index of the child to draw for that iteration.
//     *
//     * @hide
//     */
//    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 123769377)
//    protected static final int FLAG_USE_CHILD_DRAWING_ORDER = 0x400;
//
//    /**
//     * When set, this ViewGroup supports static transformations on children; this causes
//     * {@link #getChildStaticTransformation(View, Transformation)} to be
//     * invoked when a child is drawn.
//     *
//     * Any subclass overriding
//     * {@link #getChildStaticTransformation(View, Transformation)} should
//     * set this flags in {@link #mGroupFlags}.
//     *
//     * {@hide}
//     */
//    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 123769647)
//    protected static final int FLAG_SUPPORT_STATIC_TRANSFORMATIONS = 0x800;
//
//    // UNUSED FLAG VALUE: 0x1000;
//
//    /**
//     * When set, this ViewGroup's drawable states also include those
//     * of its children.
//     */
//    private static final int FLAG_ADD_STATES_FROM_CHILDREN = 0x2000;
//
//    /** @deprecated functionality removed */
//    @Deprecated
//    private static final int FLAG_ALWAYS_DRAWN_WITH_CACHE = 0x4000;
//
//    /** @deprecated functionality removed */
//    @Deprecated
//    private static final int FLAG_CHILDREN_DRAWN_WITH_CACHE = 0x8000;
//
//    /**
//     * When set, this group will go through its list of children to notify them of
//     * any drawable state change.
//     */
//    private static final int FLAG_NOTIFY_CHILDREN_ON_DRAWABLE_STATE_CHANGE = 0x10000;
//
//    private static final int FLAG_MASK_FOCUSABILITY = 0x60000;
//
//    /**
//     * This view will get focus before any of its descendants.
//     */
//    public static final int FOCUS_BEFORE_DESCENDANTS = 0x20000;
//
//    /**
//     * This view will get focus only if none of its descendants want it.
//     */
//    public static final int FOCUS_AFTER_DESCENDANTS = 0x40000;
//
//    /**
//     * This view will block any of its descendants from getting focus, even
//     * if they are focusable.
//     */
//    public static final int FOCUS_BLOCK_DESCENDANTS = 0x60000;
//
//    /**
//     * Used to map between enum in attrubutes and flag values.
//     */
//    private static final int[] DESCENDANT_FOCUSABILITY_FLAGS =
//            {FOCUS_BEFORE_DESCENDANTS, FOCUS_AFTER_DESCENDANTS,
//                    FOCUS_BLOCK_DESCENDANTS};
//
//    /**
//     * When set, this ViewGroup should not intercept touch events.
//     * {@hide}
//     */
//    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 123983692)
//    protected static final int FLAG_DISALLOW_INTERCEPT = 0x80000;
//
//    /**
//     * When set, this ViewGroup will split MotionEvents to multiple child Views when appropriate.
//     */
//    private static final int FLAG_SPLIT_MOTION_EVENTS = 0x200000;
//
//    /**
//     * When set, this ViewGroup will not dispatch onAttachedToWindow calls
//     * to children when adding new views. This is used to prevent multiple
//     * onAttached calls when a ViewGroup adds children in its own onAttached method.
//     */
//    private static final int FLAG_PREVENT_DISPATCH_ATTACHED_TO_WINDOW = 0x400000;
//
//    /**
//     * When true, indicates that a layoutMode has been explicitly set, either with
//     * an explicit call to {@link #setLayoutMode(int)} in code or from an XML resource.
//     * This distinguishes the situation in which a layout mode was inherited from
//     * one of the ViewGroup's ancestors and cached locally.
//     */
//    private static final int FLAG_LAYOUT_MODE_WAS_EXPLICITLY_SET = 0x800000;
//
//    static final int FLAG_IS_TRANSITION_GROUP = 0x1000000;
//
//    static final int FLAG_IS_TRANSITION_GROUP_SET = 0x2000000;
//
//    /**
//     * When set, focus will not be permitted to enter this group if a touchscreen is present.
//     */
//    static final int FLAG_TOUCHSCREEN_BLOCKS_FOCUS = 0x4000000;
//
//    /**
//     * When true, indicates that a call to startActionModeForChild was made with the type parameter
//     * and should not be ignored. This helps in backwards compatibility with the existing method
//     * without a type.
//     *
//     * @see #startActionModeForChild(View, ActionMode.Callback)
//     * @see #startActionModeForChild(View, ActionMode.Callback, int)
//     */
//    private static final int FLAG_START_ACTION_MODE_FOR_CHILD_IS_TYPED = 0x8000000;
//
//    /**
//     * When true, indicates that a call to startActionModeForChild was made without the type
//     * parameter. This helps in backwards compatibility with the existing method
//     * without a type.
//     *
//     * @see #startActionModeForChild(View, ActionMode.Callback)
//     * @see #startActionModeForChild(View, ActionMode.Callback, int)
//     */
//    private static final int FLAG_START_ACTION_MODE_FOR_CHILD_IS_NOT_TYPED = 0x10000000;
//
//    /**
//     * When set, indicates that a call to showContextMenuForChild was made with explicit
//     * coordinates within the initiating child view.
//     */
//    private static final int FLAG_SHOW_CONTEXT_MENU_WITH_COORDS = 0x20000000;
//
//    /**
//     * Indicates which types of drawing caches are to be kept in memory.
//     * This field should be made private, so it is hidden from the SDK.
//     * {@hide}
//     */
//    @UnsupportedAppUsage
//    protected int mPersistentDrawingCache;
//
//    /**
//     * Used to indicate that no drawing cache should be kept in memory.
//     *
//     * @deprecated The view drawing cache was largely made obsolete with the introduction of
//     * hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
//     * layers are largely unnecessary and can easily result in a net loss in performance due to the
//     * cost of creating and updating the layer. In the rare cases where caching layers are useful,
//     * such as for alpha animations, {@link #setLayerType(int, Paint)} handles this with hardware
//     * rendering. For software-rendered snapshots of a small part of the View hierarchy or
//     * individual Views it is recommended to create a {@link Canvas} from either a {@link Bitmap} or
//     * {@link android.graphics.Picture} and call {@link #draw(Canvas)} on the View. However these
//     * software-rendered usages are discouraged and have compatibility issues with hardware-only
//     * rendering features such as {@link Bitmap.Config#HARDWARE Config.HARDWARE}
//     * bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
//     * reports or unit testing the {@link PixelCopy} API is recommended.
//     */
//    @Deprecated
//    public static final int PERSISTENT_NO_CACHE = 0x0;
//
//    /**
//     * Used to indicate that the animation drawing cache should be kept in memory.
//     *
//     * @deprecated The view drawing cache was largely made obsolete with the introduction of
//     * hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
//     * layers are largely unnecessary and can easily result in a net loss in performance due to the
//     * cost of creating and updating the layer. In the rare cases where caching layers are useful,
//     * such as for alpha animations, {@link #setLayerType(int, Paint)} handles this with hardware
//     * rendering. For software-rendered snapshots of a small part of the View hierarchy or
//     * individual Views it is recommended to create a {@link Canvas} from either a {@link Bitmap} or
//     * {@link android.graphics.Picture} and call {@link #draw(Canvas)} on the View. However these
//     * software-rendered usages are discouraged and have compatibility issues with hardware-only
//     * rendering features such as {@link Bitmap.Config#HARDWARE Config.HARDWARE}
//     * bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
//     * reports or unit testing the {@link PixelCopy} API is recommended.
//     */
//    @Deprecated
//    public static final int PERSISTENT_ANIMATION_CACHE = 0x1;
//
//    /**
//     * Used to indicate that the scrolling drawing cache should be kept in memory.
//     *
//     * @deprecated The view drawing cache was largely made obsolete with the introduction of
//     * hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
//     * layers are largely unnecessary and can easily result in a net loss in performance due to the
//     * cost of creating and updating the layer. In the rare cases where caching layers are useful,
//     * such as for alpha animations, {@link #setLayerType(int, Paint)} handles this with hardware
//     * rendering. For software-rendered snapshots of a small part of the View hierarchy or
//     * individual Views it is recommended to create a {@link Canvas} from either a {@link Bitmap} or
//     * {@link android.graphics.Picture} and call {@link #draw(Canvas)} on the View. However these
//     * software-rendered usages are discouraged and have compatibility issues with hardware-only
//     * rendering features such as {@link Bitmap.Config#HARDWARE Config.HARDWARE}
//     * bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
//     * reports or unit testing the {@link PixelCopy} API is recommended.
//     */
//    @Deprecated
//    public static final int PERSISTENT_SCROLLING_CACHE = 0x2;
//
//    /**
//     * Used to indicate that all drawing caches should be kept in memory.
//     *
//     * @deprecated The view drawing cache was largely made obsolete with the introduction of
//     * hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
//     * layers are largely unnecessary and can easily result in a net loss in performance due to the
//     * cost of creating and updating the layer. In the rare cases where caching layers are useful,
//     * such as for alpha animations, {@link #setLayerType(int, Paint)} handles this with hardware
//     * rendering. For software-rendered snapshots of a small part of the View hierarchy or
//     * individual Views it is recommended to create a {@link Canvas} from either a {@link Bitmap} or
//     * {@link android.graphics.Picture} and call {@link #draw(Canvas)} on the View. However these
//     * software-rendered usages are discouraged and have compatibility issues with hardware-only
//     * rendering features such as {@link Bitmap.Config#HARDWARE Config.HARDWARE}
//     * bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
//     * reports or unit testing the {@link PixelCopy} API is recommended.
//     */
//    @Deprecated
//    public static final int PERSISTENT_ALL_CACHES = 0x3;
//
//    // Layout Modes
//
//    private static final int LAYOUT_MODE_UNDEFINED = -1;
//
//    /**
//     * This constant is a {@link #setLayoutMode(int) layoutMode}.
//     * Clip bounds are the raw values of {@link #getLeft() left}, {@link #getTop() top},
//     * {@link #getRight() right} and {@link #getBottom() bottom}.
//     */
//    public static final int LAYOUT_MODE_CLIP_BOUNDS = 0;
//
//    /**
//     * This constant is a {@link #setLayoutMode(int) layoutMode}.
//     * Optical bounds describe where a widget appears to be. They sit inside the clip
//     * bounds which need to cover a larger area to allow other effects,
//     * such as shadows and glows, to be drawn.
//     */
//    public static final int LAYOUT_MODE_OPTICAL_BOUNDS = 1;
//
//    /** @hide */
//    public static int LAYOUT_MODE_DEFAULT = LAYOUT_MODE_CLIP_BOUNDS;
//
//    /**
//     * We clip to padding when FLAG_CLIP_TO_PADDING and FLAG_PADDING_NOT_NULL
//     * are set at the same time.
//     */
//    protected static final int CLIP_TO_PADDING_MASK = FLAG_CLIP_TO_PADDING | FLAG_PADDING_NOT_NULL;
//
//    // Index of the child's left position in the mLocation array
//    private static final int CHILD_LEFT_INDEX = 0;
//    // Index of the child's top position in the mLocation array
//    private static final int CHILD_TOP_INDEX = 1;
//
//    // Child views of this ViewGroup
//    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P)
//    private View[] mChildren;
//    // Number of valid children in the mChildren array, the rest should be null or not
//    // considered as children
//    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P)
//    private int mChildrenCount;
//
//    // Whether layout calls are currently being suppressed, controlled by calls to
//    // suppressLayout()
//    boolean mSuppressLayout = false;
//
//    // Whether any layout calls have actually been suppressed while mSuppressLayout
//    // has been true. This tracks whether we need to issue a requestLayout() when
//    // layout is later re-enabled.
//    private boolean mLayoutCalledWhileSuppressed = false;
//
//    private static final int ARRAY_INITIAL_CAPACITY = 12;
//    private static final int ARRAY_CAPACITY_INCREMENT = 12;
//
//    private static float[] sDebugLines;
//
//    // Used to draw cached views
//    Paint mCachePaint;
//
//    // Used to animate add/remove changes in layout
//    private LayoutTransition mTransition;
//
//    // The set of views that are currently being transitioned. This list is used to track views
//    // being removed that should not actually be removed from the parent yet because they are
//    // being animated.
//    private ArrayList<View> mTransitioningViews;
//
//    // List of children changing visibility. This is used to potentially keep rendering
//    // views during a transition when they otherwise would have become gone/invisible
//    private ArrayList<View> mVisibilityChangingChildren;
//
//    // Temporary holder of presorted children, only used for
//    // input/software draw dispatch for correctly Z ordering.
//    private ArrayList<View> mPreSortedChildren;
//
//    // Indicates how many of this container's child subtrees contain transient state
//    @ViewDebug.ExportedProperty(category = "layout")
//    private int mChildCountWithTransientState = 0;
//
//    /**
//     * Currently registered axes for nested scrolling. Flag set consisting of
//     * {@link #SCROLL_AXIS_HORIZONTAL} {@link #SCROLL_AXIS_VERTICAL} or {@link #SCROLL_AXIS_NONE}
//     * for null.
//     */
//    private int mNestedScrollAxes;
//
//    // Used to manage the list of transient views, added by addTransientView()
//    private List<Integer> mTransientIndices = null;
//    private List<View> mTransientViews = null;
//
//    /**
//     * Keeps track of how many child views have UnhandledKeyEventListeners. This should only be
//     * updated on the UI thread so shouldn't require explicit synchronization.
//     */
//    int mChildUnhandledKeyListeners = 0;
//
//    /**
//     * Current dispatch mode of animation events
//     *
//     * @see WindowInsetsAnimation.Callback#getDispatchMode()
//     */
//    private @DispatchMode int mInsetsAnimationDispatchMode = DISPATCH_MODE_CONTINUE_ON_SUBTREE;
//
//    /**
//     * Empty ActionMode used as a sentinel in recursive entries to startActionModeForChild.
//     *
//     * @see #startActionModeForChild(View, ActionMode.Callback)
//     * @see #startActionModeForChild(View, ActionMode.Callback, int)
//     */
//    private static final ActionMode SENTINEL_ACTION_MODE = new ActionMode() {
//        @Override
//        public void setTitle(CharSequence title) {}
//
//        @Override
//        public void setTitle(int resId) {}
//
//        @Override
//        public void setSubtitle(CharSequence subtitle) {}
//
//        @Override
//        public void setSubtitle(int resId) {}
//
//        @Override
//        public void setCustomView(View view) {}
//
//        @Override
//        public void invalidate() {}
//
//        @Override
//        public void finish() {}
//
//        @Override
//        public Menu getMenu() {
//            return null;
//        }
//
//        @Override
//        public CharSequence getTitle() {
//            return null;
//        }
//
//        @Override
//        public CharSequence getSubtitle() {
//            return null;
//        }
//
//        @Override
//        public View getCustomView() {
//            return null;
//        }
//
//        @Override
//        public MenuInflater getMenuInflater() {
//            return null;
//        }
//    };
//
//    public ViewGroup(Context context) {
//        this(context, null);
//    }
//
//    public ViewGroup(Context context, AttributeSet attrs) {
//        this(context, attrs, 0);
//    }
//
//    public ViewGroup(Context context, AttributeSet attrs, int defStyleAttr) {
//        this(context, attrs, defStyleAttr, 0);
//    }
//
//    public ViewGroup(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
//        super(context, attrs, defStyleAttr, defStyleRes);
//
//        initViewGroup();
//        initFromAttributes(context, attrs, defStyleAttr, defStyleRes);
//    }
//
//    private void initViewGroup() {
//        // ViewGroup doesn't draw by default
//        if (!isShowingLayoutBounds()) {
//            setFlags(WILL_NOT_DRAW, DRAW_MASK);
//        }
//        mGroupFlags |= FLAG_CLIP_CHILDREN;
//        mGroupFlags |= FLAG_CLIP_TO_PADDING;
//        mGroupFlags |= FLAG_ANIMATION_DONE;
//        mGroupFlags |= FLAG_ANIMATION_CACHE;
//        mGroupFlags |= FLAG_ALWAYS_DRAWN_WITH_CACHE;
//
//        if (mContext.getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.HONEYCOMB) {
//            mGroupFlags |= FLAG_SPLIT_MOTION_EVENTS;
//        }
//
//        setDescendantFocusability(FOCUS_BEFORE_DESCENDANTS);
//
//        mChildren = new View[ARRAY_INITIAL_CAPACITY];
//        mChildrenCount = 0;
//
//        mPersistentDrawingCache = PERSISTENT_SCROLLING_CACHE;
//    }
//
//    private void initFromAttributes(
//            Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
//        final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ViewGroup,
//                defStyleAttr, defStyleRes);
//        saveAttributeDataForStyleable(context, R.styleable.ViewGroup, attrs, a, defStyleAttr,
//                defStyleRes);
//
//        final int N = a.getIndexCount();
//        for (int i = 0; i < N; i++) {
//            int attr = a.getIndex(i);
//            switch (attr) {
//                case R.styleable.ViewGroup_clipChildren:
//                    setClipChildren(a.getBoolean(attr, true));
//                    break;
//                case R.styleable.ViewGroup_clipToPadding:
//                    setClipToPadding(a.getBoolean(attr, true));
//                    break;
//                case R.styleable.ViewGroup_animationCache:
//                    setAnimationCacheEnabled(a.getBoolean(attr, true));
//                    break;
//                case R.styleable.ViewGroup_persistentDrawingCache:
//                    setPersistentDrawingCache(a.getInt(attr, PERSISTENT_SCROLLING_CACHE));
//                    break;
//                case R.styleable.ViewGroup_addStatesFromChildren:
//                    setAddStatesFromChildren(a.getBoolean(attr, false));
//                    break;
//                case R.styleable.ViewGroup_alwaysDrawnWithCache:
//                    setAlwaysDrawnWithCacheEnabled(a.getBoolean(attr, true));
//                    break;
//                case R.styleable.ViewGroup_layoutAnimation:
//                    int id = a.getResourceId(attr, -1);
//                    if (id > 0) {
//                        setLayoutAnimation(AnimationUtils.loadLayoutAnimation(mContext, id));
//                    }
//                    break;
//                case R.styleable.ViewGroup_descendantFocusability:
//                    setDescendantFocusability(DESCENDANT_FOCUSABILITY_FLAGS[a.getInt(attr, 0)]);
//                    break;
//                case R.styleable.ViewGroup_splitMotionEvents:
//                    setMotionEventSplittingEnabled(a.getBoolean(attr, false));
//                    break;
//                case R.styleable.ViewGroup_animateLayoutChanges:
//                    boolean animateLayoutChanges = a.getBoolean(attr, false);
//                    if (animateLayoutChanges) {
//                        setLayoutTransition(new LayoutTransition());
//                    }
//                    break;
//                case R.styleable.ViewGroup_layoutMode:
//                    setLayoutMode(a.getInt(attr, LAYOUT_MODE_UNDEFINED));
//                    break;
//                case R.styleable.ViewGroup_transitionGroup:
//                    setTransitionGroup(a.getBoolean(attr, false));
//                    break;
//                case R.styleable.ViewGroup_touchscreenBlocksFocus:
//                    setTouchscreenBlocksFocus(a.getBoolean(attr, false));
//                    break;
//            }
//        }
//
//        a.recycle();
//    }
//
//    /**
//     * Gets the descendant focusability of this view group.  The descendant
//     * focusability defines the relationship between this view group and its
//     * descendants when looking for a view to take focus in
//     * {@link #requestFocus(int, Rect)}.
//     *
//     * @return one of {@link #FOCUS_BEFORE_DESCENDANTS}, {@link #FOCUS_AFTER_DESCENDANTS},
//     *   {@link #FOCUS_BLOCK_DESCENDANTS}.
//     */
//    @ViewDebug.ExportedProperty(category = "focus", mapping = {
//            @ViewDebug.IntToString(from = FOCUS_BEFORE_DESCENDANTS, to = "FOCUS_BEFORE_DESCENDANTS"),
//            @ViewDebug.IntToString(from = FOCUS_AFTER_DESCENDANTS, to = "FOCUS_AFTER_DESCENDANTS"),
//            @ViewDebug.IntToString(from = FOCUS_BLOCK_DESCENDANTS, to = "FOCUS_BLOCK_DESCENDANTS")
//    })
//    @InspectableProperty(enumMapping = {
//            @EnumEntry(value = FOCUS_BEFORE_DESCENDANTS, name = "beforeDescendants"),
//            @EnumEntry(value = FOCUS_AFTER_DESCENDANTS, name = "afterDescendants"),
//            @EnumEntry(value = FOCUS_BLOCK_DESCENDANTS, name = "blocksDescendants")
//    })
//    public int getDescendantFocusability() {
//        return mGroupFlags & FLAG_MASK_FOCUSABILITY;
//    }
//
//    /**
//     * Set the descendant focusability of this view group. This defines the relationship
//     * between this view group and its descendants when looking for a view to
//     * take focus in {@link #requestFocus(int, Rect)}.
//     *
//     * @param focusability one of {@link #FOCUS_BEFORE_DESCENDANTS}, {@link #FOCUS_AFTER_DESCENDANTS},
//     *   {@link #FOCUS_BLOCK_DESCENDANTS}.
//     */
//    public void setDescendantFocusability(int focusability) {
//        switch (focusability) {
//            case FOCUS_BEFORE_DESCENDANTS:
//            case FOCUS_AFTER_DESCENDANTS:
//            case FOCUS_BLOCK_DESCENDANTS:
//                break;
//            default:
//                throw new IllegalArgumentException("must be one of FOCUS_BEFORE_DESCENDANTS, "
//                        + "FOCUS_AFTER_DESCENDANTS, FOCUS_BLOCK_DESCENDANTS");
//        }
//        mGroupFlags &= ~FLAG_MASK_FOCUSABILITY;
//        mGroupFlags |= (focusability & FLAG_MASK_FOCUSABILITY);
//    }
//
//    @Override
//    void handleFocusGainInternal(int direction, Rect previouslyFocusedRect) {
//        if (mFocused != null) {
//            mFocused.unFocus(this);
//            mFocused = null;
//            mFocusedInCluster = null;
//        }
//        super.handleFocusGainInternal(direction, previouslyFocusedRect);
//    }
//
//    @Override
//    public void requestChildFocus(View child, View focused) {
//        if (DBG) {
//            System.out.println(this + " requestChildFocus()");
//        }
//        if (getDescendantFocusability() == FOCUS_BLOCK_DESCENDANTS) {
//            return;
//        }
//
//        // Unfocus us, if necessary
//        super.unFocus(focused);
//
//        // We had a previous notion of who had focus. Clear it.
//        if (mFocused != child) {
//            if (mFocused != null) {
//                mFocused.unFocus(focused);
//            }
//
//            mFocused = child;
//        }
//        if (mParent != null) {
//            mParent.requestChildFocus(this, focused);
//        }
//    }
//
//    void setDefaultFocus(View child) {
//        // Stop at any higher view which is explicitly focused-by-default
//        if (mDefaultFocus != null && mDefaultFocus.isFocusedByDefault()) {
//            return;
//        }
//
//        mDefaultFocus = child;
//
//        if (mParent instanceof android.view.ViewGroup) {
//            ((android.view.ViewGroup) mParent).setDefaultFocus(this);
//        }
//    }
//
//    /**
//     * Clears the default-focus chain from {@param child} up to the first parent which has another
//     * default-focusable branch below it or until there is no default-focus chain.
//     *
//     * @param child
//     */
//    void clearDefaultFocus(View child) {
//        // Stop at any higher view which is explicitly focused-by-default
//        if (mDefaultFocus != child && mDefaultFocus != null
//                && mDefaultFocus.isFocusedByDefault()) {
//            return;
//        }
//
//        mDefaultFocus = null;
//
//        // Search child siblings for default focusables.
//        for (int i = 0; i < mChildrenCount; ++i) {
//            View sibling = mChildren[i];
//            if (sibling.isFocusedByDefault()) {
//                mDefaultFocus = sibling;
//                return;
//            } else if (mDefaultFocus == null && sibling.hasDefaultFocus()) {
//                mDefaultFocus = sibling;
//            }
//        }
//
//        if (mParent instanceof android.view.ViewGroup) {
//            ((android.view.ViewGroup) mParent).clearDefaultFocus(this);
//        }
//    }
//
//    @Override
//    boolean hasDefaultFocus() {
//        return mDefaultFocus != null || super.hasDefaultFocus();
//    }
//
//    /**
//     * Removes {@code child} (and associated focusedInCluster chain) from the cluster containing
//     * it.
//     * <br>
//     * This is intended to be run on {@code child}'s immediate parent. This is necessary because
//     * the chain is sometimes cleared after {@code child} has been detached.
//     */
//    void clearFocusedInCluster(View child) {
//        if (mFocusedInCluster != child) {
//            return;
//        }
//        clearFocusedInCluster();
//    }
//
//    /**
//     * Removes the focusedInCluster chain from this up to the cluster containing it.
//     */
//    void clearFocusedInCluster() {
//        View top = findKeyboardNavigationCluster();
//        ViewParent parent = this;
//        do {
//            ((android.view.ViewGroup) parent).mFocusedInCluster = null;
//            if (parent == top) {
//                break;
//            }
//            parent = parent.getParent();
//        } while (parent instanceof android.view.ViewGroup);
//    }
//
//    @Override
//    public void focusableViewAvailable(View v) {
//        if (mParent != null
//                // shortcut: don't report a new focusable view if we block our descendants from
//                // getting focus or if we're not visible
//                && (getDescendantFocusability() != FOCUS_BLOCK_DESCENDANTS)
//                && ((mViewFlags & VISIBILITY_MASK) == VISIBLE)
//                && (isFocusableInTouchMode() || !shouldBlockFocusForTouchscreen())
//                // shortcut: don't report a new focusable view if we already are focused
//                // (and we don't prefer our descendants)
//                //
//                // note: knowing that mFocused is non-null is not a good enough reason
//                // to break the traversal since in that case we'd actually have to find
//                // the focused view and make sure it wasn't FOCUS_AFTER_DESCENDANTS and
//                // an ancestor of v; this will get checked for at ViewAncestor
//                && !(isFocused() && getDescendantFocusability() != FOCUS_AFTER_DESCENDANTS)) {
//            mParent.focusableViewAvailable(v);
//        }
//    }
//
//    @Override
//    public boolean showContextMenuForChild(View originalView) {
//        if (isShowingContextMenuWithCoords()) {
//            // We're being called for compatibility. Return false and let the version
//            // with coordinates recurse up.
//            return false;
//        }
//        return mParent != null && mParent.showContextMenuForChild(originalView);
//    }
//
//    /**
//     * @hide used internally for compatibility with existing app code only
//     */
//    public final boolean isShowingContextMenuWithCoords() {
//        return (mGroupFlags & FLAG_SHOW_CONTEXT_MENU_WITH_COORDS) != 0;
//    }
//
//    @Override
//    public boolean showContextMenuForChild(View originalView, float x, float y) {
//        try {
//            mGroupFlags |= FLAG_SHOW_CONTEXT_MENU_WITH_COORDS;
//            if (showContextMenuForChild(originalView)) {
//                return true;
//            }
//        } finally {
//            mGroupFlags &= ~FLAG_SHOW_CONTEXT_MENU_WITH_COORDS;
//        }
//        return mParent != null && mParent.showContextMenuForChild(originalView, x, y);
//    }
//
//    @Override
//    public ActionMode startActionModeForChild(View originalView, ActionMode.Callback callback) {
//        if ((mGroupFlags & FLAG_START_ACTION_MODE_FOR_CHILD_IS_TYPED) == 0) {
//            // This is the original call.
//            try {
//                mGroupFlags |= FLAG_START_ACTION_MODE_FOR_CHILD_IS_NOT_TYPED;
//                return startActionModeForChild(originalView, callback, ActionMode.TYPE_PRIMARY);
//            } finally {
//                mGroupFlags &= ~FLAG_START_ACTION_MODE_FOR_CHILD_IS_NOT_TYPED;
//            }
//        } else {
//            // We are being called from the new method with type.
//            return SENTINEL_ACTION_MODE;
//        }
//    }
//
//    @Override
//    public ActionMode startActionModeForChild(
//            View originalView, ActionMode.Callback callback, int type) {
//        if ((mGroupFlags & FLAG_START_ACTION_MODE_FOR_CHILD_IS_NOT_TYPED) == 0
//                && type == ActionMode.TYPE_PRIMARY) {
//            ActionMode mode;
//            try {
//                mGroupFlags |= FLAG_START_ACTION_MODE_FOR_CHILD_IS_TYPED;
//                mode = startActionModeForChild(originalView, callback);
//            } finally {
//                mGroupFlags &= ~FLAG_START_ACTION_MODE_FOR_CHILD_IS_TYPED;
//            }
//            if (mode != SENTINEL_ACTION_MODE) {
//                return mode;
//            }
//        }
//        if (mParent != null) {
//            try {
//                return mParent.startActionModeForChild(originalView, callback, type);
//            } catch (AbstractMethodError ame) {
//                // Custom view parents might not implement this method.
//                return mParent.startActionModeForChild(originalView, callback);
//            }
//        }
//        return null;
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public boolean dispatchActivityResult(
//            String who, int requestCode, int resultCode, Intent data) {
//        if (super.dispatchActivityResult(who, requestCode, resultCode, data)) {
//            return true;
//        }
//        int childCount = getChildCount();
//        for (int i = 0; i < childCount; i++) {
//            View child = getChildAt(i);
//            if (child.dispatchActivityResult(who, requestCode, resultCode, data)) {
//                return true;
//            }
//        }
//        return false;
//    }
//
//    /**
//     * Find the nearest view in the specified direction that wants to take
//     * focus.
//     *
//     * @param focused The view that currently has focus
//     * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and
//     *        FOCUS_RIGHT, or 0 for not applicable.
//     */
//    @Override
//    public View focusSearch(View focused, int direction) {
//        if (isRootNamespace()) {
//            // root namespace means we should consider ourselves the top of the
//            // tree for focus searching; otherwise we could be focus searching
//            // into other tabs.  see LocalActivityManager and TabHost for more info.
//            return FocusFinder.getInstance().findNextFocus(this, focused, direction);
//        } else if (mParent != null) {
//            return mParent.focusSearch(focused, direction);
//        }
//        return null;
//    }
//
//    @Override
//    public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) {
//        return false;
//    }
//
//    @Override
//    public boolean requestSendAccessibilityEvent(View child, AccessibilityEvent event) {
//        ViewParent parent = mParent;
//        if (parent == null) {
//            return false;
//        }
//        final boolean propagate = onRequestSendAccessibilityEvent(child, event);
//        if (!propagate) {
//            return false;
//        }
//        return parent.requestSendAccessibilityEvent(this, event);
//    }
//
//    /**
//     * Called when a child has requested sending an {@link AccessibilityEvent} and
//     * gives an opportunity to its parent to augment the event.
//     * <p>
//     * If an {@link AccessibilityDelegate} has been specified via calling
//     * {@link View#setAccessibilityDelegate(AccessibilityDelegate)} its
//     * {@link AccessibilityDelegate#onRequestSendAccessibilityEvent(android.view.ViewGroup, View, AccessibilityEvent)}
//     * is responsible for handling this call.
//     * </p>
//     *
//     * @param child The child which requests sending the event.
//     * @param event The event to be sent.
//     * @return True if the event should be sent.
//     *
//     * @see #requestSendAccessibilityEvent(View, AccessibilityEvent)
//     */
//    public boolean onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) {
//        if (mAccessibilityDelegate != null) {
//            return mAccessibilityDelegate.onRequestSendAccessibilityEvent(this, child, event);
//        } else {
//            return onRequestSendAccessibilityEventInternal(child, event);
//        }
//    }
//
//    /**
//     * @see #onRequestSendAccessibilityEvent(View, AccessibilityEvent)
//     *
//     * Note: Called from the default {@link AccessibilityDelegate}.
//     *
//     * @hide
//     */
//    public boolean onRequestSendAccessibilityEventInternal(View child, AccessibilityEvent event) {
//        return true;
//    }
//
//    /**
//     * Called when a child view has changed whether or not it is tracking transient state.
//     */
//    @Override
//    public void childHasTransientStateChanged(View child, boolean childHasTransientState) {
//        final boolean oldHasTransientState = hasTransientState();
//        if (childHasTransientState) {
//            mChildCountWithTransientState++;
//        } else {
//            mChildCountWithTransientState--;
//        }
//
//        final boolean newHasTransientState = hasTransientState();
//        if (mParent != null && oldHasTransientState != newHasTransientState) {
//            try {
//                mParent.childHasTransientStateChanged(this, newHasTransientState);
//            } catch (AbstractMethodError e) {
//                Log.e(TAG, mParent.getClass().getSimpleName() +
//                        " does not fully implement ViewParent", e);
//            }
//        }
//    }
//
//    @Override
//    public boolean hasTransientState() {
//        return mChildCountWithTransientState > 0 || super.hasTransientState();
//    }
//
//    @Override
//    public boolean dispatchUnhandledMove(View focused, int direction) {
//        return mFocused != null &&
//                mFocused.dispatchUnhandledMove(focused, direction);
//    }
//
//    @Override
//    public void clearChildFocus(View child) {
//        if (DBG) {
//            System.out.println(this + " clearChildFocus()");
//        }
//
//        mFocused = null;
//        if (mParent != null) {
//            mParent.clearChildFocus(this);
//        }
//    }
//
//    @Override
//    public void clearFocus() {
//        if (DBG) {
//            System.out.println(this + " clearFocus()");
//        }
//        if (mFocused == null) {
//            super.clearFocus();
//        } else {
//            View focused = mFocused;
//            mFocused = null;
//            focused.clearFocus();
//        }
//    }
//
//    @Override
//    void unFocus(View focused) {
//        if (DBG) {
//            System.out.println(this + " unFocus()");
//        }
//        if (mFocused == null) {
//            super.unFocus(focused);
//        } else {
//            mFocused.unFocus(focused);
//            mFocused = null;
//        }
//    }
//
//    /**
//     * Returns the focused child of this view, if any. The child may have focus
//     * or contain focus.
//     *
//     * @return the focused child or null.
//     */
//    public View getFocusedChild() {
//        return mFocused;
//    }
//
//    View getDeepestFocusedChild() {
//        View v = this;
//        while (v != null) {
//            if (v.isFocused()) {
//                return v;
//            }
//            v = v instanceof android.view.ViewGroup ? ((android.view.ViewGroup) v).getFocusedChild() : null;
//        }
//        return null;
//    }
//
//    /**
//     * Returns true if this view has or contains focus
//     *
//     * @return true if this view has or contains focus
//     */
//    @Override
//    public boolean hasFocus() {
//        return (mPrivateFlags & PFLAG_FOCUSED) != 0 || mFocused != null;
//    }
//
//    /*
//     * (non-Javadoc)
//     *
//     * @see android.view.View#findFocus()
//     */
//    @Override
//    public View findFocus() {
//        if (DBG) {
//            System.out.println("Find focus in " + this + ": flags="
//                    + isFocused() + ", child=" + mFocused);
//        }
//
//        if (isFocused()) {
//            return this;
//        }
//
//        if (mFocused != null) {
//            return mFocused.findFocus();
//        }
//        return null;
//    }
//
//    @Override
//    boolean hasFocusable(boolean allowAutoFocus, boolean dispatchExplicit) {
//        // This should probably be super.hasFocusable, but that would change
//        // behavior. Historically, we have not checked the ancestor views for
//        // shouldBlockFocusForTouchscreen() in ViewGroup.hasFocusable.
//
//        // Invisible and gone views are never focusable.
//        if ((mViewFlags & VISIBILITY_MASK) != VISIBLE) {
//            return false;
//        }
//
//        // Only use effective focusable value when allowed.
//        if ((allowAutoFocus || getFocusable() != FOCUSABLE_AUTO) && isFocusable()) {
//            return true;
//        }
//
//        // Determine whether we have a focused descendant.
//        final int descendantFocusability = getDescendantFocusability();
//        if (descendantFocusability != FOCUS_BLOCK_DESCENDANTS) {
//            return hasFocusableChild(dispatchExplicit);
//        }
//
//        return false;
//    }
//
//    boolean hasFocusableChild(boolean dispatchExplicit) {
//        // Determine whether we have a focusable descendant.
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//
//        for (int i = 0; i < count; i++) {
//            final View child = children[i];
//
//            // In case the subclass has overridden has[Explicit]Focusable, dispatch
//            // to the expected one for each child even though we share logic here.
//            if ((dispatchExplicit && child.hasExplicitFocusable())
//                    || (!dispatchExplicit && child.hasFocusable())) {
//                return true;
//            }
//        }
//
//        return false;
//    }
//
//    @Override
//    public void addFocusables(ArrayList<View> views, int direction, int focusableMode) {
//        final int focusableCount = views.size();
//
//        final int descendantFocusability = getDescendantFocusability();
//        final boolean blockFocusForTouchscreen = shouldBlockFocusForTouchscreen();
//        final boolean focusSelf = (isFocusableInTouchMode() || !blockFocusForTouchscreen);
//
//        if (descendantFocusability == FOCUS_BLOCK_DESCENDANTS) {
//            if (focusSelf) {
//                super.addFocusables(views, direction, focusableMode);
//            }
//            return;
//        }
//
//        if (blockFocusForTouchscreen) {
//            focusableMode |= FOCUSABLES_TOUCH_MODE;
//        }
//
//        if ((descendantFocusability == FOCUS_BEFORE_DESCENDANTS) && focusSelf) {
//            super.addFocusables(views, direction, focusableMode);
//        }
//
//        int count = 0;
//        final View[] children = new View[mChildrenCount];
//        for (int i = 0; i < mChildrenCount; ++i) {
//            View child = mChildren[i];
//            if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
//                children[count++] = child;
//            }
//        }
//        FocusFinder.sort(children, 0, count, this, isLayoutRtl());
//        for (int i = 0; i < count; ++i) {
//            children[i].addFocusables(views, direction, focusableMode);
//        }
//
//        // When set to FOCUS_AFTER_DESCENDANTS, we only add ourselves if
//        // there aren't any focusable descendants.  this is
//        // to avoid the focus search finding layouts when a more precise search
//        // among the focusable children would be more interesting.
//        if ((descendantFocusability == FOCUS_AFTER_DESCENDANTS) && focusSelf
//                && focusableCount == views.size()) {
//            super.addFocusables(views, direction, focusableMode);
//        }
//    }
//
//    @Override
//    public void addKeyboardNavigationClusters(Collection<View> views, int direction) {
//        final int focusableCount = views.size();
//
//        if (isKeyboardNavigationCluster()) {
//            // Cluster-navigation can enter a touchscreenBlocksFocus cluster, so temporarily
//            // disable touchscreenBlocksFocus to evaluate whether it contains focusables.
//            final boolean blockedFocus = getTouchscreenBlocksFocus();
//            try {
//                setTouchscreenBlocksFocusNoRefocus(false);
//                super.addKeyboardNavigationClusters(views, direction);
//            } finally {
//                setTouchscreenBlocksFocusNoRefocus(blockedFocus);
//            }
//        } else {
//            super.addKeyboardNavigationClusters(views, direction);
//        }
//
//        if (focusableCount != views.size()) {
//            // No need to look for groups inside a group.
//            return;
//        }
//
//        if (getDescendantFocusability() == FOCUS_BLOCK_DESCENDANTS) {
//            return;
//        }
//
//        int count = 0;
//        final View[] visibleChildren = new View[mChildrenCount];
//        for (int i = 0; i < mChildrenCount; ++i) {
//            final View child = mChildren[i];
//            if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
//                visibleChildren[count++] = child;
//            }
//        }
//        FocusFinder.sort(visibleChildren, 0, count, this, isLayoutRtl());
//        for (int i = 0; i < count; ++i) {
//            visibleChildren[i].addKeyboardNavigationClusters(views, direction);
//        }
//    }
//
//    /**
//     * Set whether this ViewGroup should ignore focus requests for itself and its children.
//     * If this option is enabled and the ViewGroup or a descendant currently has focus, focus
//     * will proceed forward.
//     *
//     * @param touchscreenBlocksFocus true to enable blocking focus in the presence of a touchscreen
//     */
//    public void setTouchscreenBlocksFocus(boolean touchscreenBlocksFocus) {
//        if (touchscreenBlocksFocus) {
//            mGroupFlags |= FLAG_TOUCHSCREEN_BLOCKS_FOCUS;
//            if (hasFocus() && !isKeyboardNavigationCluster()) {
//                final View focusedChild = getDeepestFocusedChild();
//                if (!focusedChild.isFocusableInTouchMode()) {
//                    final View newFocus = focusSearch(FOCUS_FORWARD);
//                    if (newFocus != null) {
//                        newFocus.requestFocus();
//                    }
//                }
//            }
//        } else {
//            mGroupFlags &= ~FLAG_TOUCHSCREEN_BLOCKS_FOCUS;
//        }
//    }
//
//    private void setTouchscreenBlocksFocusNoRefocus(boolean touchscreenBlocksFocus) {
//        if (touchscreenBlocksFocus) {
//            mGroupFlags |= FLAG_TOUCHSCREEN_BLOCKS_FOCUS;
//        } else {
//            mGroupFlags &= ~FLAG_TOUCHSCREEN_BLOCKS_FOCUS;
//        }
//    }
//
//    /**
//     * Check whether this ViewGroup should ignore focus requests for itself and its children.
//     */
//    @ViewDebug.ExportedProperty(category = "focus")
//    @InspectableProperty
//    public boolean getTouchscreenBlocksFocus() {
//        return (mGroupFlags & FLAG_TOUCHSCREEN_BLOCKS_FOCUS) != 0;
//    }
//
//    boolean shouldBlockFocusForTouchscreen() {
//        // There is a special case for keyboard-navigation clusters. We allow cluster navigation
//        // to jump into blockFocusForTouchscreen ViewGroups which are clusters. Once in the
//        // cluster, focus is free to move around within it.
//        return getTouchscreenBlocksFocus() &&
//                mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN)
//                && !(isKeyboardNavigationCluster()
//                && (hasFocus() || (findKeyboardNavigationCluster() != this)));
//    }
//
//    @Override
//    public void findViewsWithText(ArrayList<View> outViews, CharSequence text, int flags) {
//        super.findViewsWithText(outViews, text, flags);
//        final int childrenCount = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < childrenCount; i++) {
//            View child = children[i];
//            if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE
//                    && (child.mPrivateFlags & PFLAG_IS_ROOT_NAMESPACE) == 0) {
//                child.findViewsWithText(outViews, text, flags);
//            }
//        }
//    }
//
//    /** @hide */
//    @Override
//    public View findViewByAccessibilityIdTraversal(int accessibilityId) {
//        View foundView = super.findViewByAccessibilityIdTraversal(accessibilityId);
//        if (foundView != null) {
//            return foundView;
//        }
//
//        if (getAccessibilityNodeProvider() != null) {
//            return null;
//        }
//
//        final int childrenCount = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < childrenCount; i++) {
//            View child = children[i];
//            foundView = child.findViewByAccessibilityIdTraversal(accessibilityId);
//            if (foundView != null) {
//                return foundView;
//            }
//        }
//
//        return null;
//    }
//
//    /** @hide */
//    @Override
//    public View findViewByAutofillIdTraversal(int autofillId) {
//        View foundView = super.findViewByAutofillIdTraversal(autofillId);
//        if (foundView != null) {
//            return foundView;
//        }
//
//        final int childrenCount = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < childrenCount; i++) {
//            View child = children[i];
//            foundView = child.findViewByAutofillIdTraversal(autofillId);
//            if (foundView != null) {
//                return foundView;
//            }
//        }
//
//        return null;
//    }
//
//    @Override
//    public void dispatchWindowFocusChanged(boolean hasFocus) {
//        super.dispatchWindowFocusChanged(hasFocus);
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchWindowFocusChanged(hasFocus);
//        }
//    }
//
//    @Override
//    public void addTouchables(ArrayList<View> views) {
//        super.addTouchables(views);
//
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//
//        for (int i = 0; i < count; i++) {
//            final View child = children[i];
//            if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
//                child.addTouchables(views);
//            }
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    @UnsupportedAppUsage
//    public void makeOptionalFitsSystemWindows() {
//        super.makeOptionalFitsSystemWindows();
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].makeOptionalFitsSystemWindows();
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public void makeFrameworkOptionalFitsSystemWindows() {
//        super.makeFrameworkOptionalFitsSystemWindows();
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].makeFrameworkOptionalFitsSystemWindows();
//        }
//    }
//
//    @Override
//    public void dispatchDisplayHint(int hint) {
//        super.dispatchDisplayHint(hint);
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchDisplayHint(hint);
//        }
//    }
//
//    /**
//     * Called when a view's visibility has changed. Notify the parent to take any appropriate
//     * action.
//     *
//     * @param child The view whose visibility has changed
//     * @param oldVisibility The previous visibility value (GONE, INVISIBLE, or VISIBLE).
//     * @param newVisibility The new visibility value (GONE, INVISIBLE, or VISIBLE).
//     * @hide
//     */
//    @UnsupportedAppUsage
//    protected void onChildVisibilityChanged(View child, int oldVisibility, int newVisibility) {
//        if (mTransition != null) {
//            if (newVisibility == VISIBLE) {
//                mTransition.showChild(this, child, oldVisibility);
//            } else {
//                mTransition.hideChild(this, child, newVisibility);
//                if (mTransitioningViews != null && mTransitioningViews.contains(child)) {
//                    // Only track this on disappearing views - appearing views are already visible
//                    // and don't need special handling during drawChild()
//                    if (mVisibilityChangingChildren == null) {
//                        mVisibilityChangingChildren = new ArrayList<View>();
//                    }
//                    mVisibilityChangingChildren.add(child);
//                    addDisappearingView(child);
//                }
//            }
//        }
//
//        // in all cases, for drags
//        if (newVisibility == VISIBLE && mCurrentDragStartEvent != null) {
//            if (!mChildrenInterestedInDrag.contains(child)) {
//                notifyChildOfDragStart(child);
//            }
//        }
//    }
//
//    @Override
//    protected void dispatchVisibilityChanged(View changedView, int visibility) {
//        super.dispatchVisibilityChanged(changedView, visibility);
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchVisibilityChanged(changedView, visibility);
//        }
//    }
//
//    @Override
//    public void dispatchWindowVisibilityChanged(int visibility) {
//        super.dispatchWindowVisibilityChanged(visibility);
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchWindowVisibilityChanged(visibility);
//        }
//    }
//
//    @Override
//    boolean dispatchVisibilityAggregated(boolean isVisible) {
//        isVisible = super.dispatchVisibilityAggregated(isVisible);
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            // Only dispatch to visible children. Not visible children and their subtrees already
//            // know that they aren't visible and that's not going to change as a result of
//            // whatever triggered this dispatch.
//            if (children[i].getVisibility() == VISIBLE) {
//                children[i].dispatchVisibilityAggregated(isVisible);
//            }
//        }
//        return isVisible;
//    }
//
//    @Override
//    public void dispatchConfigurationChanged(Configuration newConfig) {
//        super.dispatchConfigurationChanged(newConfig);
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchConfigurationChanged(newConfig);
//        }
//    }
//
//    @Override
//    public void recomputeViewAttributes(View child) {
//        if (mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) {
//            ViewParent parent = mParent;
//            if (parent != null) parent.recomputeViewAttributes(this);
//        }
//    }
//
//    @Override
//    void dispatchCollectViewAttributes(AttachInfo attachInfo, int visibility) {
//        if ((visibility & VISIBILITY_MASK) == VISIBLE) {
//            super.dispatchCollectViewAttributes(attachInfo, visibility);
//            final int count = mChildrenCount;
//            final View[] children = mChildren;
//            for (int i = 0; i < count; i++) {
//                final View child = children[i];
//                child.dispatchCollectViewAttributes(attachInfo,
//                        visibility | (child.mViewFlags&VISIBILITY_MASK));
//            }
//        }
//    }
//
//    @Override
//    public void bringChildToFront(View child) {
//        final int index = indexOfChild(child);
//        if (index >= 0) {
//            removeFromArray(index);
//            addInArray(child, mChildrenCount);
//            child.mParent = this;
//            requestLayout();
//            invalidate();
//        }
//    }
//
//    private PointF getLocalPoint() {
//        if (mLocalPoint == null) mLocalPoint = new PointF();
//        return mLocalPoint;
//    }
//
//    @Override
//    boolean dispatchDragEnterExitInPreN(DragEvent event) {
//        if (event.mAction == DragEvent.ACTION_DRAG_EXITED && mCurrentDragChild != null) {
//            // The drag exited a sub-tree of views; notify of the exit all descendants that are in
//            // entered state.
//            // We don't need this recursive delivery for ENTERED events because they get generated
//            // from the recursive delivery of LOCATION/DROP events, and hence, don't need their own
//            // recursion.
//            mCurrentDragChild.dispatchDragEnterExitInPreN(event);
//            mCurrentDragChild = null;
//        }
//        return mIsInterestedInDrag && super.dispatchDragEnterExitInPreN(event);
//    }
//
//    // TODO: Write real docs
//    @Override
//    public boolean dispatchDragEvent(DragEvent event) {
//        boolean retval = false;
//        final float tx = event.mX;
//        final float ty = event.mY;
//        final ClipData td = event.mClipData;
//
//        // Dispatch down the view hierarchy
//        final PointF localPoint = getLocalPoint();
//
//        switch (event.mAction) {
//            case DragEvent.ACTION_DRAG_STARTED: {
//                // Clear the state to recalculate which views we drag over.
//                mCurrentDragChild = null;
//
//                // Set up our tracking of drag-started notifications
//                mCurrentDragStartEvent = DragEvent.obtain(event);
//                if (mChildrenInterestedInDrag == null) {
//                    mChildrenInterestedInDrag = new HashSet<View>();
//                } else {
//                    mChildrenInterestedInDrag.clear();
//                }
//
//                // Now dispatch down to our children, caching the responses
//                final int count = mChildrenCount;
//                final View[] children = mChildren;
//                for (int i = 0; i < count; i++) {
//                    final View child = children[i];
//                    child.mPrivateFlags2 &= ~View.DRAG_MASK;
//                    if (child.getVisibility() == VISIBLE) {
//                        if (notifyChildOfDragStart(children[i])) {
//                            retval = true;
//                        }
//                    }
//                }
//
//                // Notify itself of the drag start.
//                mIsInterestedInDrag = super.dispatchDragEvent(event);
//                if (mIsInterestedInDrag) {
//                    retval = true;
//                }
//
//                if (!retval) {
//                    // Neither us nor any of our children are interested in this drag, so stop tracking
//                    // the current drag event.
//                    mCurrentDragStartEvent.recycle();
//                    mCurrentDragStartEvent = null;
//                }
//            } break;
//
//            case DragEvent.ACTION_DRAG_ENDED: {
//                // Release the bookkeeping now that the drag lifecycle has ended
//                final HashSet<View> childrenInterestedInDrag = mChildrenInterestedInDrag;
//                if (childrenInterestedInDrag != null) {
//                    for (View child : childrenInterestedInDrag) {
//                        // If a child was interested in the ongoing drag, it's told that it's over
//                        if (child.dispatchDragEvent(event)) {
//                            retval = true;
//                        }
//                    }
//                    childrenInterestedInDrag.clear();
//                }
//                if (mCurrentDragStartEvent != null) {
//                    mCurrentDragStartEvent.recycle();
//                    mCurrentDragStartEvent = null;
//                }
//
//                if (mIsInterestedInDrag) {
//                    if (super.dispatchDragEvent(event)) {
//                        retval = true;
//                    }
//                    mIsInterestedInDrag = false;
//                }
//            } break;
//
//            case DragEvent.ACTION_DRAG_LOCATION:
//            case DragEvent.ACTION_DROP: {
//                // Find the [possibly new] drag target
//                View target = findFrontmostDroppableChildAt(event.mX, event.mY, localPoint);
//
//                if (target != mCurrentDragChild) {
//                    if (sCascadedDragDrop) {
//                        // For pre-Nougat apps, make sure that the whole hierarchy of views that contain
//                        // the drag location is kept in the state between ENTERED and EXITED events.
//                        // (Starting with N, only the innermost view will be in that state).
//
//                        final int action = event.mAction;
//                        // Position should not be available for ACTION_DRAG_ENTERED and
//                        // ACTION_DRAG_EXITED.
//                        event.mX = 0;
//                        event.mY = 0;
//                        event.mClipData = null;
//
//                        if (mCurrentDragChild != null) {
//                            event.mAction = DragEvent.ACTION_DRAG_EXITED;
//                            mCurrentDragChild.dispatchDragEnterExitInPreN(event);
//                        }
//
//                        if (target != null) {
//                            event.mAction = DragEvent.ACTION_DRAG_ENTERED;
//                            target.dispatchDragEnterExitInPreN(event);
//                        }
//
//                        event.mAction = action;
//                        event.mX = tx;
//                        event.mY = ty;
//                        event.mClipData = td;
//                    }
//                    mCurrentDragChild = target;
//                }
//
//                if (target == null && mIsInterestedInDrag) {
//                    target = this;
//                }
//
//                // Dispatch the actual drag notice, localized into the target coordinates.
//                if (target != null) {
//                    if (target != this) {
//                        event.mX = localPoint.x;
//                        event.mY = localPoint.y;
//
//                        retval = target.dispatchDragEvent(event);
//
//                        event.mX = tx;
//                        event.mY = ty;
//
//                        if (mIsInterestedInDrag) {
//                            final boolean eventWasConsumed;
//                            if (sCascadedDragDrop) {
//                                eventWasConsumed = retval;
//                            } else {
//                                eventWasConsumed = event.mEventHandlerWasCalled;
//                            }
//
//                            if (!eventWasConsumed) {
//                                retval = super.dispatchDragEvent(event);
//                            }
//                        }
//                    } else {
//                        retval = super.dispatchDragEvent(event);
//                    }
//                }
//            } break;
//        }
//
//        return retval;
//    }
//
//    // Find the frontmost child view that lies under the given point, and calculate
//    // the position within its own local coordinate system.
//    View findFrontmostDroppableChildAt(float x, float y, PointF outLocalPoint) {
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = count - 1; i >= 0; i--) {
//            final View child = children[i];
//            if (!child.canAcceptDrag()) {
//                continue;
//            }
//
//            if (isTransformedTouchPointInView(x, y, child, outLocalPoint)) {
//                return child;
//            }
//        }
//        return null;
//    }
//
//    boolean notifyChildOfDragStart(View child) {
//        // The caller guarantees that the child is not in mChildrenInterestedInDrag yet.
//
//        if (ViewDebug.DEBUG_DRAG) {
//            Log.d(View.VIEW_LOG_TAG, "Sending drag-started to view: " + child);
//        }
//
//        final float tx = mCurrentDragStartEvent.mX;
//        final float ty = mCurrentDragStartEvent.mY;
//
//        final float[] point = getTempLocationF();
//        point[0] = tx;
//        point[1] = ty;
//        transformPointToViewLocal(point, child);
//
//        mCurrentDragStartEvent.mX = point[0];
//        mCurrentDragStartEvent.mY = point[1];
//        final boolean canAccept = child.dispatchDragEvent(mCurrentDragStartEvent);
//        mCurrentDragStartEvent.mX = tx;
//        mCurrentDragStartEvent.mY = ty;
//        mCurrentDragStartEvent.mEventHandlerWasCalled = false;
//        if (canAccept) {
//            mChildrenInterestedInDrag.add(child);
//            if (!child.canAcceptDrag()) {
//                child.mPrivateFlags2 |= View.PFLAG2_DRAG_CAN_ACCEPT;
//                child.refreshDrawableState();
//            }
//        }
//        return canAccept;
//    }
//
//    @Override
//    @Deprecated
//    public void dispatchWindowSystemUiVisiblityChanged(int visible) {
//        super.dispatchWindowSystemUiVisiblityChanged(visible);
//
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i=0; i <count; i++) {
//            final View child = children[i];
//            child.dispatchWindowSystemUiVisiblityChanged(visible);
//        }
//    }
//
//    @Override
//    @Deprecated
//    public void dispatchSystemUiVisibilityChanged(int visible) {
//        super.dispatchSystemUiVisibilityChanged(visible);
//
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i=0; i <count; i++) {
//            final View child = children[i];
//            child.dispatchSystemUiVisibilityChanged(visible);
//        }
//    }
//
//    @Override
//    boolean updateLocalSystemUiVisibility(int localValue, int localChanges) {
//        boolean changed = super.updateLocalSystemUiVisibility(localValue, localChanges);
//
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i=0; i <count; i++) {
//            final View child = children[i];
//            changed |= child.updateLocalSystemUiVisibility(localValue, localChanges);
//        }
//        return changed;
//    }
//
//    @Override
//    public boolean dispatchKeyEventPreIme(KeyEvent event) {
//        if ((mPrivateFlags & (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS))
//                == (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS)) {
//            return super.dispatchKeyEventPreIme(event);
//        } else if (mFocused != null && (mFocused.mPrivateFlags & PFLAG_HAS_BOUNDS)
//                == PFLAG_HAS_BOUNDS) {
//            return mFocused.dispatchKeyEventPreIme(event);
//        }
//        return false;
//    }
//
//    @Override
//    public boolean dispatchKeyEvent(KeyEvent event) {
//        if (mInputEventConsistencyVerifier != null) {
//            mInputEventConsistencyVerifier.onKeyEvent(event, 1);
//        }
//
//        if ((mPrivateFlags & (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS))
//                == (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS)) {
//            if (super.dispatchKeyEvent(event)) {
//                return true;
//            }
//        } else if (mFocused != null && (mFocused.mPrivateFlags & PFLAG_HAS_BOUNDS)
//                == PFLAG_HAS_BOUNDS) {
//            if (mFocused.dispatchKeyEvent(event)) {
//                return true;
//            }
//        }
//
//        if (mInputEventConsistencyVerifier != null) {
//            mInputEventConsistencyVerifier.onUnhandledEvent(event, 1);
//        }
//        return false;
//    }
//
//    @Override
//    public boolean dispatchKeyShortcutEvent(KeyEvent event) {
//        if ((mPrivateFlags & (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS))
//                == (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS)) {
//            return super.dispatchKeyShortcutEvent(event);
//        } else if (mFocused != null && (mFocused.mPrivateFlags & PFLAG_HAS_BOUNDS)
//                == PFLAG_HAS_BOUNDS) {
//            return mFocused.dispatchKeyShortcutEvent(event);
//        }
//        return false;
//    }
//
//    @Override
//    public boolean dispatchTrackballEvent(MotionEvent event) {
//        if (mInputEventConsistencyVerifier != null) {
//            mInputEventConsistencyVerifier.onTrackballEvent(event, 1);
//        }
//
//        if ((mPrivateFlags & (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS))
//                == (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS)) {
//            if (super.dispatchTrackballEvent(event)) {
//                return true;
//            }
//        } else if (mFocused != null && (mFocused.mPrivateFlags & PFLAG_HAS_BOUNDS)
//                == PFLAG_HAS_BOUNDS) {
//            if (mFocused.dispatchTrackballEvent(event)) {
//                return true;
//            }
//        }
//
//        if (mInputEventConsistencyVerifier != null) {
//            mInputEventConsistencyVerifier.onUnhandledEvent(event, 1);
//        }
//        return false;
//    }
//
//    @Override
//    public boolean dispatchCapturedPointerEvent(MotionEvent event) {
//        if ((mPrivateFlags & (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS))
//                == (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS)) {
//            if (super.dispatchCapturedPointerEvent(event)) {
//                return true;
//            }
//        } else if (mFocused != null && (mFocused.mPrivateFlags & PFLAG_HAS_BOUNDS)
//                == PFLAG_HAS_BOUNDS) {
//            if (mFocused.dispatchCapturedPointerEvent(event)) {
//                return true;
//            }
//        }
//        return false;
//    }
//
//    @Override
//    public void dispatchPointerCaptureChanged(boolean hasCapture) {
//        exitHoverTargets();
//
//        super.dispatchPointerCaptureChanged(hasCapture);
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchPointerCaptureChanged(hasCapture);
//        }
//    }
//
//    @Override
//    public PointerIcon onResolvePointerIcon(MotionEvent event, int pointerIndex) {
//        final float x = event.getX(pointerIndex);
//        final float y = event.getY(pointerIndex);
//        if (isOnScrollbarThumb(x, y) || isDraggingScrollBar()) {
//            return PointerIcon.getSystemIcon(mContext, PointerIcon.TYPE_ARROW);
//        }
//        // Check what the child under the pointer says about the pointer.
//        final int childrenCount = mChildrenCount;
//        if (childrenCount != 0) {
//            final ArrayList<View> preorderedList = buildOrderedChildList();
//            final boolean customOrder = preorderedList == null
//                    && isChildrenDrawingOrderEnabled();
//            final View[] children = mChildren;
//            for (int i = childrenCount - 1; i >= 0; i--) {
//                final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//                final View child = getAndVerifyPreorderedView(preorderedList, children, childIndex);
//                View childWithAccessibilityFocus =
//                        event.isTargetAccessibilityFocus()
//                                ? findChildWithAccessibilityFocus()
//                                : null;
//
//                if (!child.canReceivePointerEvents()
//                        || !isTransformedTouchPointInView(x, y, child, null)) {
//
//                    // If there is a view that has accessibility focus we want it
//                    // to get the event first and if not handled we will perform a
//                    // normal dispatch. We may do a double iteration but this is
//                    // safer given the timeframe.
//                    if (childWithAccessibilityFocus != null) {
//                        if (childWithAccessibilityFocus != child) {
//                            continue;
//                        }
//                        childWithAccessibilityFocus = null;
//                        i = childrenCount - 1;
//                    }
//                    event.setTargetAccessibilityFocus(false);
//                    continue;
//                }
//                final PointerIcon pointerIcon =
//                        dispatchResolvePointerIcon(event, pointerIndex, child);
//                if (pointerIcon != null) {
//                    if (preorderedList != null) preorderedList.clear();
//                    return pointerIcon;
//                }
//            }
//            if (preorderedList != null) preorderedList.clear();
//        }
//
//        // The pointer is not a child or the child has no preferences, returning the default
//        // implementation.
//        return super.onResolvePointerIcon(event, pointerIndex);
//    }
//
//    private PointerIcon dispatchResolvePointerIcon(MotionEvent event, int pointerIndex,
//                                                   View child) {
//        final PointerIcon pointerIcon;
//        if (!child.hasIdentityMatrix()) {
//            MotionEvent transformedEvent = getTransformedMotionEvent(event, child);
//            pointerIcon = child.onResolvePointerIcon(transformedEvent, pointerIndex);
//            transformedEvent.recycle();
//        } else {
//            final float offsetX = mScrollX - child.mLeft;
//            final float offsetY = mScrollY - child.mTop;
//            event.offsetLocation(offsetX, offsetY);
//            pointerIcon = child.onResolvePointerIcon(event, pointerIndex);
//            event.offsetLocation(-offsetX, -offsetY);
//        }
//        return pointerIcon;
//    }
//
//    private int getAndVerifyPreorderedIndex(int childrenCount, int i, boolean customOrder) {
//        final int childIndex;
//        if (customOrder) {
//            final int childIndex1 = getChildDrawingOrder(childrenCount, i);
//            if (childIndex1 >= childrenCount) {
//                throw new IndexOutOfBoundsException("getChildDrawingOrder() "
//                        + "returned invalid index " + childIndex1
//                        + " (child count is " + childrenCount + ")");
//            }
//            childIndex = childIndex1;
//        } else {
//            childIndex = i;
//        }
//        return childIndex;
//    }
//
//    @SuppressWarnings({"ConstantConditions"})
//    @Override
//    protected boolean dispatchHoverEvent(MotionEvent event) {
//        final int action = event.getAction();
//
//        // First check whether the view group wants to intercept the hover event.
//        final boolean interceptHover = onInterceptHoverEvent(event);
//        event.setAction(action); // restore action in case it was changed
//
//        MotionEvent eventNoHistory = event;
//        boolean handled = false;
//
//        // Send events to the hovered children and build a new list of hover targets until
//        // one is found that handles the event.
//        HoverTarget firstOldHoverTarget = mFirstHoverTarget;
//        mFirstHoverTarget = null;
//        if (!interceptHover && action != MotionEvent.ACTION_HOVER_EXIT) {
//            final float x = event.getX();
//            final float y = event.getY();
//            final int childrenCount = mChildrenCount;
//            if (childrenCount != 0) {
//                final ArrayList<View> preorderedList = buildOrderedChildList();
//                final boolean customOrder = preorderedList == null
//                        && isChildrenDrawingOrderEnabled();
//                final View[] children = mChildren;
//                HoverTarget lastHoverTarget = null;
//                for (int i = childrenCount - 1; i >= 0; i--) {
//                    final int childIndex = getAndVerifyPreorderedIndex(
//                            childrenCount, i, customOrder);
//                    final View child = getAndVerifyPreorderedView(
//                            preorderedList, children, childIndex);
//                    if (!child.canReceivePointerEvents()
//                            || !isTransformedTouchPointInView(x, y, child, null)) {
//                        continue;
//                    }
//
//                    // Obtain a hover target for this child.  Dequeue it from the
//                    // old hover target list if the child was previously hovered.
//                    HoverTarget hoverTarget = firstOldHoverTarget;
//                    final boolean wasHovered;
//                    for (HoverTarget predecessor = null; ;) {
//                        if (hoverTarget == null) {
//                            hoverTarget = HoverTarget.obtain(child);
//                            wasHovered = false;
//                            break;
//                        }
//
//                        if (hoverTarget.child == child) {
//                            if (predecessor != null) {
//                                predecessor.next = hoverTarget.next;
//                            } else {
//                                firstOldHoverTarget = hoverTarget.next;
//                            }
//                            hoverTarget.next = null;
//                            wasHovered = true;
//                            break;
//                        }
//
//                        predecessor = hoverTarget;
//                        hoverTarget = hoverTarget.next;
//                    }
//
//                    // Enqueue the hover target onto the new hover target list.
//                    if (lastHoverTarget != null) {
//                        lastHoverTarget.next = hoverTarget;
//                    } else {
//                        mFirstHoverTarget = hoverTarget;
//                    }
//                    lastHoverTarget = hoverTarget;
//
//                    // Dispatch the event to the child.
//                    if (action == MotionEvent.ACTION_HOVER_ENTER) {
//                        if (!wasHovered) {
//                            // Send the enter as is.
//                            handled |= dispatchTransformedGenericPointerEvent(
//                                    event, child); // enter
//                        }
//                    } else if (action == MotionEvent.ACTION_HOVER_MOVE) {
//                        if (!wasHovered) {
//                            // Synthesize an enter from a move.
//                            eventNoHistory = obtainMotionEventNoHistoryOrSelf(eventNoHistory);
//                            eventNoHistory.setAction(MotionEvent.ACTION_HOVER_ENTER);
//                            handled |= dispatchTransformedGenericPointerEvent(
//                                    eventNoHistory, child); // enter
//                            eventNoHistory.setAction(action);
//
//                            handled |= dispatchTransformedGenericPointerEvent(
//                                    eventNoHistory, child); // move
//                        } else {
//                            // Send the move as is.
//                            handled |= dispatchTransformedGenericPointerEvent(event, child);
//                        }
//                    }
//                    if (handled) {
//                        break;
//                    }
//                }
//                if (preorderedList != null) preorderedList.clear();
//            }
//        }
//
//        // Send exit events to all previously hovered children that are no longer hovered.
//        while (firstOldHoverTarget != null) {
//            final View child = firstOldHoverTarget.child;
//
//            // Exit the old hovered child.
//            if (action == MotionEvent.ACTION_HOVER_EXIT) {
//                // Send the exit as is.
//                handled |= dispatchTransformedGenericPointerEvent(
//                        event, child); // exit
//            } else {
//                // Synthesize an exit from a move or enter.
//                // Ignore the result because hover focus has moved to a different view.
//                if (action == MotionEvent.ACTION_HOVER_MOVE) {
//                    final boolean hoverExitPending = event.isHoverExitPending();
//                    event.setHoverExitPending(true);
//                    dispatchTransformedGenericPointerEvent(
//                            event, child); // move
//                    event.setHoverExitPending(hoverExitPending);
//                }
//                eventNoHistory = obtainMotionEventNoHistoryOrSelf(eventNoHistory);
//                eventNoHistory.setAction(MotionEvent.ACTION_HOVER_EXIT);
//                dispatchTransformedGenericPointerEvent(
//                        eventNoHistory, child); // exit
//                eventNoHistory.setAction(action);
//            }
//
//            final HoverTarget nextOldHoverTarget = firstOldHoverTarget.next;
//            firstOldHoverTarget.recycle();
//            firstOldHoverTarget = nextOldHoverTarget;
//        }
//
//        // Send events to the view group itself if no children have handled it and the view group
//        // itself is not currently being hover-exited.
//        boolean newHoveredSelf = !handled &&
//                (action != MotionEvent.ACTION_HOVER_EXIT) && !event.isHoverExitPending();
//        if (newHoveredSelf == mHoveredSelf) {
//            if (newHoveredSelf) {
//                // Send event to the view group as before.
//                handled |= super.dispatchHoverEvent(event);
//            }
//        } else {
//            if (mHoveredSelf) {
//                // Exit the view group.
//                if (action == MotionEvent.ACTION_HOVER_EXIT) {
//                    // Send the exit as is.
//                    handled |= super.dispatchHoverEvent(event); // exit
//                } else {
//                    // Synthesize an exit from a move or enter.
//                    // Ignore the result because hover focus is moving to a different view.
//                    if (action == MotionEvent.ACTION_HOVER_MOVE) {
//                        super.dispatchHoverEvent(event); // move
//                    }
//                    eventNoHistory = obtainMotionEventNoHistoryOrSelf(eventNoHistory);
//                    eventNoHistory.setAction(MotionEvent.ACTION_HOVER_EXIT);
//                    super.dispatchHoverEvent(eventNoHistory); // exit
//                    eventNoHistory.setAction(action);
//                }
//                mHoveredSelf = false;
//            }
//
//            if (newHoveredSelf) {
//                // Enter the view group.
//                if (action == MotionEvent.ACTION_HOVER_ENTER) {
//                    // Send the enter as is.
//                    handled |= super.dispatchHoverEvent(event); // enter
//                    mHoveredSelf = true;
//                } else if (action == MotionEvent.ACTION_HOVER_MOVE) {
//                    // Synthesize an enter from a move.
//                    eventNoHistory = obtainMotionEventNoHistoryOrSelf(eventNoHistory);
//                    eventNoHistory.setAction(MotionEvent.ACTION_HOVER_ENTER);
//                    handled |= super.dispatchHoverEvent(eventNoHistory); // enter
//                    eventNoHistory.setAction(action);
//
//                    handled |= super.dispatchHoverEvent(eventNoHistory); // move
//                    mHoveredSelf = true;
//                }
//            }
//        }
//
//        // Recycle the copy of the event that we made.
//        if (eventNoHistory != event) {
//            eventNoHistory.recycle();
//        }
//
//        // Done.
//        return handled;
//    }
//
//    private void exitHoverTargets() {
//        if (mHoveredSelf || mFirstHoverTarget != null) {
//            final long now = SystemClock.uptimeMillis();
//            MotionEvent event = MotionEvent.obtain(now, now,
//                    MotionEvent.ACTION_HOVER_EXIT, 0.0f, 0.0f, 0);
//            event.setSource(InputDevice.SOURCE_TOUCHSCREEN);
//            dispatchHoverEvent(event);
//            event.recycle();
//        }
//    }
//
//    private void cancelHoverTarget(View view) {
//        HoverTarget predecessor = null;
//        HoverTarget target = mFirstHoverTarget;
//        while (target != null) {
//            final HoverTarget next = target.next;
//            if (target.child == view) {
//                if (predecessor == null) {
//                    mFirstHoverTarget = next;
//                } else {
//                    predecessor.next = next;
//                }
//                target.recycle();
//
//                final long now = SystemClock.uptimeMillis();
//                MotionEvent event = MotionEvent.obtain(now, now,
//                        MotionEvent.ACTION_HOVER_EXIT, 0.0f, 0.0f, 0);
//                event.setSource(InputDevice.SOURCE_TOUCHSCREEN);
//                view.dispatchHoverEvent(event);
//                event.recycle();
//                return;
//            }
//            predecessor = target;
//            target = next;
//        }
//    }
//
//    @Override
//    boolean dispatchTooltipHoverEvent(MotionEvent event) {
//        final int action = event.getAction();
//        switch (action) {
//            case MotionEvent.ACTION_HOVER_ENTER:
//                break;
//
//            case MotionEvent.ACTION_HOVER_MOVE:
//                View newTarget = null;
//
//                // Check what the child under the pointer says about the tooltip.
//                final int childrenCount = mChildrenCount;
//                if (childrenCount != 0) {
//                    final float x = event.getX();
//                    final float y = event.getY();
//
//                    final ArrayList<View> preorderedList = buildOrderedChildList();
//                    final boolean customOrder = preorderedList == null
//                            && isChildrenDrawingOrderEnabled();
//                    final View[] children = mChildren;
//                    for (int i = childrenCount - 1; i >= 0; i--) {
//                        final int childIndex =
//                                getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//                        final View child =
//                                getAndVerifyPreorderedView(preorderedList, children, childIndex);
//                        if (!child.canReceivePointerEvents()
//                                || !isTransformedTouchPointInView(x, y, child, null)) {
//                            continue;
//                        }
//                        if (dispatchTooltipHoverEvent(event, child)) {
//                            newTarget = child;
//                            break;
//                        }
//                    }
//                    if (preorderedList != null) preorderedList.clear();
//                }
//
//                if (mTooltipHoverTarget != newTarget) {
//                    if (mTooltipHoverTarget != null) {
//                        event.setAction(MotionEvent.ACTION_HOVER_EXIT);
//                        mTooltipHoverTarget.dispatchTooltipHoverEvent(event);
//                        event.setAction(action);
//                    }
//                    mTooltipHoverTarget = newTarget;
//                }
//
//                if (mTooltipHoverTarget != null) {
//                    if (mTooltipHoveredSelf) {
//                        mTooltipHoveredSelf = false;
//                        event.setAction(MotionEvent.ACTION_HOVER_EXIT);
//                        super.dispatchTooltipHoverEvent(event);
//                        event.setAction(action);
//                    }
//                    return true;
//                }
//
//                mTooltipHoveredSelf = super.dispatchTooltipHoverEvent(event);
//                return mTooltipHoveredSelf;
//
//            case MotionEvent.ACTION_HOVER_EXIT:
//                if (mTooltipHoverTarget != null) {
//                    mTooltipHoverTarget.dispatchTooltipHoverEvent(event);
//                    mTooltipHoverTarget = null;
//                } else if (mTooltipHoveredSelf) {
//                    super.dispatchTooltipHoverEvent(event);
//                    mTooltipHoveredSelf = false;
//                }
//                break;
//        }
//        return false;
//    }
//
//    private boolean dispatchTooltipHoverEvent(MotionEvent event, View child) {
//        final boolean result;
//        if (!child.hasIdentityMatrix()) {
//            MotionEvent transformedEvent = getTransformedMotionEvent(event, child);
//            result = child.dispatchTooltipHoverEvent(transformedEvent);
//            transformedEvent.recycle();
//        } else {
//            final float offsetX = mScrollX - child.mLeft;
//            final float offsetY = mScrollY - child.mTop;
//            event.offsetLocation(offsetX, offsetY);
//            result = child.dispatchTooltipHoverEvent(event);
//            event.offsetLocation(-offsetX, -offsetY);
//        }
//        return result;
//    }
//
//    private void exitTooltipHoverTargets() {
//        if (mTooltipHoveredSelf || mTooltipHoverTarget != null) {
//            final long now = SystemClock.uptimeMillis();
//            MotionEvent event = MotionEvent.obtain(now, now,
//                    MotionEvent.ACTION_HOVER_EXIT, 0.0f, 0.0f, 0);
//            event.setSource(InputDevice.SOURCE_TOUCHSCREEN);
//            dispatchTooltipHoverEvent(event);
//            event.recycle();
//        }
//    }
//
//    /** @hide */
//    @Override
//    protected boolean hasHoveredChild() {
//        return mFirstHoverTarget != null;
//    }
//
//    /** @hide */
//    @Override
//    protected boolean pointInHoveredChild(MotionEvent event) {
//        if (mFirstHoverTarget != null) {
//            return isTransformedTouchPointInView(event.getX(), event.getY(),
//                    mFirstHoverTarget.child, null);
//        }
//        return false;
//    }
//
//    @Override
//    public void addChildrenForAccessibility(ArrayList<View> outChildren) {
//        if (getAccessibilityNodeProvider() != null) {
//            return;
//        }
//        ChildListForAccessibility children = ChildListForAccessibility.obtain(this, true);
//        try {
//            final int childrenCount = children.getChildCount();
//            for (int i = 0; i < childrenCount; i++) {
//                View child = children.getChildAt(i);
//                if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
//                    if (child.includeForAccessibility()) {
//                        outChildren.add(child);
//                    } else {
//                        child.addChildrenForAccessibility(outChildren);
//                    }
//                }
//            }
//        } finally {
//            children.recycle();
//        }
//    }
//
//    /**
//     * Implement this method to intercept hover events before they are handled
//     * by child views.
//     * <p>
//     * This method is called before dispatching a hover event to a child of
//     * the view group or to the view group's own {@link #onHoverEvent} to allow
//     * the view group a chance to intercept the hover event.
//     * This method can also be used to watch all pointer motions that occur within
//     * the bounds of the view group even when the pointer is hovering over
//     * a child of the view group rather than over the view group itself.
//     * </p><p>
//     * The view group can prevent its children from receiving hover events by
//     * implementing this method and returning <code>true</code> to indicate
//     * that it would like to intercept hover events.  The view group must
//     * continuously return <code>true</code> from {@link #onInterceptHoverEvent}
//     * for as long as it wishes to continue intercepting hover events from
//     * its children.
//     * </p><p>
//     * Interception preserves the invariant that at most one view can be
//     * hovered at a time by transferring hover focus from the currently hovered
//     * child to the view group or vice-versa as needed.
//     * </p><p>
//     * If this method returns <code>true</code> and a child is already hovered, then the
//     * child view will first receive a hover exit event and then the view group
//     * itself will receive a hover enter event in {@link #onHoverEvent}.
//     * Likewise, if this method had previously returned <code>true</code> to intercept hover
//     * events and instead returns <code>false</code> while the pointer is hovering
//     * within the bounds of one of a child, then the view group will first receive a
//     * hover exit event in {@link #onHoverEvent} and then the hovered child will
//     * receive a hover enter event.
//     * </p><p>
//     * The default implementation handles mouse hover on the scroll bars.
//     * </p>
//     *
//     * @param event The motion event that describes the hover.
//     * @return True if the view group would like to intercept the hover event
//     * and prevent its children from receiving it.
//     */
//    public boolean onInterceptHoverEvent(MotionEvent event) {
//        if (event.isFromSource(InputDevice.SOURCE_MOUSE)) {
//            final int action = event.getAction();
//            final float x = event.getX();
//            final float y = event.getY();
//            if ((action == MotionEvent.ACTION_HOVER_MOVE
//                    || action == MotionEvent.ACTION_HOVER_ENTER) && isOnScrollbar(x, y)) {
//                return true;
//            }
//        }
//        return false;
//    }
//
//    private static MotionEvent obtainMotionEventNoHistoryOrSelf(MotionEvent event) {
//        if (event.getHistorySize() == 0) {
//            return event;
//        }
//        return MotionEvent.obtainNoHistory(event);
//    }
//
//    @Override
//    protected boolean dispatchGenericPointerEvent(MotionEvent event) {
//        // Send the event to the child under the pointer.
//        final int childrenCount = mChildrenCount;
//        if (childrenCount != 0) {
//            final float x = event.getX();
//            final float y = event.getY();
//
//            final ArrayList<View> preorderedList = buildOrderedChildList();
//            final boolean customOrder = preorderedList == null
//                    && isChildrenDrawingOrderEnabled();
//            final View[] children = mChildren;
//            for (int i = childrenCount - 1; i >= 0; i--) {
//                final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//                final View child = getAndVerifyPreorderedView(preorderedList, children, childIndex);
//                if (!child.canReceivePointerEvents()
//                        || !isTransformedTouchPointInView(x, y, child, null)) {
//                    continue;
//                }
//
//                if (dispatchTransformedGenericPointerEvent(event, child)) {
//                    if (preorderedList != null) preorderedList.clear();
//                    return true;
//                }
//            }
//            if (preorderedList != null) preorderedList.clear();
//        }
//
//        // No child handled the event.  Send it to this view group.
//        return super.dispatchGenericPointerEvent(event);
//    }
//
//    @Override
//    protected boolean dispatchGenericFocusedEvent(MotionEvent event) {
//        // Send the event to the focused child or to this view group if it has focus.
//        if ((mPrivateFlags & (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS))
//                == (PFLAG_FOCUSED | PFLAG_HAS_BOUNDS)) {
//            return super.dispatchGenericFocusedEvent(event);
//        } else if (mFocused != null && (mFocused.mPrivateFlags & PFLAG_HAS_BOUNDS)
//                == PFLAG_HAS_BOUNDS) {
//            return mFocused.dispatchGenericMotionEvent(event);
//        }
//        return false;
//    }
//
//    /**
//     * Dispatches a generic pointer event to a child, taking into account
//     * transformations that apply to the child.
//     *
//     * @param event The event to send.
//     * @param child The view to send the event to.
//     * @return {@code true} if the child handled the event.
//     */
//    private boolean dispatchTransformedGenericPointerEvent(MotionEvent event, View child) {
//        boolean handled;
//        if (!child.hasIdentityMatrix()) {
//            MotionEvent transformedEvent = getTransformedMotionEvent(event, child);
//            handled = child.dispatchGenericMotionEvent(transformedEvent);
//            transformedEvent.recycle();
//        } else {
//            final float offsetX = mScrollX - child.mLeft;
//            final float offsetY = mScrollY - child.mTop;
//            event.offsetLocation(offsetX, offsetY);
//            handled = child.dispatchGenericMotionEvent(event);
//            event.offsetLocation(-offsetX, -offsetY);
//        }
//        return handled;
//    }
//
//    /**
//     * Returns a MotionEvent that's been transformed into the child's local coordinates.
//     *
//     * It's the responsibility of the caller to recycle it once they're finished with it.
//     * @param event The event to transform.
//     * @param child The view whose coordinate space is to be used.
//     * @return A copy of the the given MotionEvent, transformed into the given View's coordinate
//     *         space.
//     */
//    private MotionEvent getTransformedMotionEvent(MotionEvent event, View child) {
//        final float offsetX = mScrollX - child.mLeft;
//        final float offsetY = mScrollY - child.mTop;
//        final MotionEvent transformedEvent = MotionEvent.obtain(event);
//        transformedEvent.offsetLocation(offsetX, offsetY);
//        if (!child.hasIdentityMatrix()) {
//            transformedEvent.transform(child.getInverseMatrix());
//        }
//        return transformedEvent;
//    }
//
//
//    //首先进入的事件，分发触摸事件
//    @Override
//    public boolean dispatchTouchEvent(MotionEvent ev) {
//        if (mInputEventConsistencyVerifier != null) {
//            mInputEventConsistencyVerifier.onTouchEvent(ev, 1);
//        }
//
//        // If the event targets the accessibility focused view and this is it, start
//        // normal event dispatch. Maybe a descendant is what will handle the click.
//        if (ev.isTargetAccessibilityFocus() && isAccessibilityFocusedViewOrHost()) {
//            ev.setTargetAccessibilityFocus(false);
//        }
//
//        //是否处理过 最终标志 贯穿方法
//        boolean handled = false;
//        if (onFilterTouchEventForSecurity(ev)) {
//            final int action = ev.getAction();
//            final int actionMasked = action & MotionEvent.ACTION_MASK;
//
//            //处理新的action down事件，清除之前状态
//            // Handle an initial down.
//            if (actionMasked == MotionEvent.ACTION_DOWN) {
//                // Throw away all previous state when starting a new touch gesture.
//                // The framework may have dropped the up or cancel event for the previous gesture
//                // due to an app switch, ANR, or some other state change.
//                cancelAndClearTouchTargets(ev);
//                resetTouchState();
//            }
//
//            // Check for interception.
//            final boolean intercepted;
//            if (actionMasked == MotionEvent.ACTION_DOWN
//                    || mFirstTouchTarget != null) {
//                final boolean disallowIntercept = (mGroupFlags & FLAG_DISALLOW_INTERCEPT) != 0;
//                if (!disallowIntercept) {
//                    //先去看看是否拦截这个触摸方法
//                    intercepted = onInterceptTouchEvent(ev);
//                    //将存储的action信息重新赋值给MotionEvent
//                    ev.setAction(action); // restore action in case it was changed
//                } else {
//                    intercepted = false;
//                }
//            } else {
//                // There are no touch targets and this action is not an initial down
//                // so this view group continues to intercept touches.
//                //不是down事件且没有可以处理touch事件的view 会一直拦截
//                intercepted = true;
//            }
//
//            // If intercepted, start normal event dispatch. Also if there is already
//            // a view that is handling the gesture, do normal event dispatch.
//            if (intercepted || mFirstTouchTarget != null) {
//                ev.setTargetAccessibilityFocus(false);
//            }
//
//            // Check for cancelation.
//            final boolean canceled = resetCancelNextUpFlag(this)
//                    || actionMasked == MotionEvent.ACTION_CANCEL;
//
//            // Update list of touch targets for pointer down, if needed.
//            final boolean isMouseEvent = ev.getSource() == InputDevice.SOURCE_MOUSE;
//            final boolean split = (mGroupFlags & FLAG_SPLIT_MOTION_EVENTS) != 0
//                    && !isMouseEvent;
//            TouchTarget newTouchTarget = null;
//            boolean alreadyDispatchedToNewTouchTarget = false;
//            if (!canceled && !intercepted) {
//                // If the event is targeting accessibility focus we give it to the
//                // view that has accessibility focus and if it does not handle it
//                // we clear the flag and dispatch the event to all children as usual.
//                // We are looking up the accessibility focused host to avoid keeping
//                // state since these events are very rare.
//                View childWithAccessibilityFocus = ev.isTargetAccessibilityFocus()
//                        ? findChildWithAccessibilityFocus() : null;
//
//                if (actionMasked == MotionEvent.ACTION_DOWN
//                        || (split && actionMasked == MotionEvent.ACTION_POINTER_DOWN)
//                        || actionMasked == MotionEvent.ACTION_HOVER_MOVE) {
//                    final int actionIndex = ev.getActionIndex(); // always 0 for down
//                    final int idBitsToAssign = split ? 1 << ev.getPointerId(actionIndex)
//                            : TouchTarget.ALL_POINTER_IDS;
//
//                    // Clean up earlier touch targets for this pointer id in case they
//                    // have become out of sync.
//                    removePointersFromTouchTargets(idBitsToAssign);
//
//                    final int childrenCount = mChildrenCount;
//                    if (newTouchTarget == null && childrenCount != 0) {
//                        final float x =
//                                isMouseEvent ? ev.getXCursorPosition() : ev.getX(actionIndex);
//                        final float y =
//                                isMouseEvent ? ev.getYCursorPosition() : ev.getY(actionIndex);
//                        // Find a child that can receive the event.
//                        // Scan children from front to back.
//                        final ArrayList<View> preorderedList = buildTouchDispatchChildList();
//                        final boolean customOrder = preorderedList == null
//                                && isChildrenDrawingOrderEnabled();
//                        final View[] children = mChildren;
//                        for (int i = childrenCount - 1; i >= 0; i--) {
//                            final int childIndex = getAndVerifyPreorderedIndex(
//                                    childrenCount, i, customOrder);
//                            final View child = getAndVerifyPreorderedView(
//                                    preorderedList, children, childIndex);
//                            if (!child.canReceivePointerEvents()
//                                    || !isTransformedTouchPointInView(x, y, child, null)) {
//                                continue;
//                            }
//
//                            newTouchTarget = getTouchTarget(child);
//                            if (newTouchTarget != null) {
//                                // Child is already receiving touch within its bounds.
//                                // Give it the new pointer in addition to the ones it is handling.
//                                newTouchTarget.pointerIdBits |= idBitsToAssign;
//                                break;
//                            }
//
//                            resetCancelNextUpFlag(child);
//                            if (dispatchTransformedTouchEvent(ev, false, child, idBitsToAssign)) {
//                                // Child wants to receive touch within its bounds.
//                                mLastTouchDownTime = ev.getDownTime();
//                                if (preorderedList != null) {
//                                    // childIndex points into presorted list, find original index
//                                    for (int j = 0; j < childrenCount; j++) {
//                                        if (children[childIndex] == mChildren[j]) {
//                                            mLastTouchDownIndex = j;
//                                            break;
//                                        }
//                                    }
//                                } else {
//                                    mLastTouchDownIndex = childIndex;
//                                }
//                                mLastTouchDownX = ev.getX();
//                                mLastTouchDownY = ev.getY();
//                                newTouchTarget = addTouchTarget(child, idBitsToAssign);
//                                alreadyDispatchedToNewTouchTarget = true;
//                                break;
//                            }
//
//                            // The accessibility focus didn't handle the event, so clear
//                            // the flag and do a normal dispatch to all children.
//                            ev.setTargetAccessibilityFocus(false);
//                        }
//                        if (preorderedList != null) preorderedList.clear();
//                    }
//
//                    if (newTouchTarget == null && mFirstTouchTarget != null) {
//                        // Did not find a child to receive the event.
//                        // Assign the pointer to the least recently added target.
//                        newTouchTarget = mFirstTouchTarget;
//                        while (newTouchTarget.next != null) {
//                            newTouchTarget = newTouchTarget.next;
//                        }
//                        newTouchTarget.pointerIdBits |= idBitsToAssign;
//                    }
//                }
//            }
//
//            // Dispatch to touch targets.
//            if (mFirstTouchTarget == null) {
//                // No touch targets so treat this as an ordinary view.
//                handled = dispatchTransformedTouchEvent(ev, canceled, null,
//                        TouchTarget.ALL_POINTER_IDS);
//            } else {
//                // Dispatch to touch targets, excluding the new touch target if we already
//                // dispatched to it.  Cancel touch targets if necessary.
//                TouchTarget predecessor = null;
//                TouchTarget target = mFirstTouchTarget;
//                while (target != null) {
//                    final TouchTarget next = target.next;
//                    if (alreadyDispatchedToNewTouchTarget && target == newTouchTarget) {
//                        handled = true;
//                    } else {
//                        final boolean cancelChild = resetCancelNextUpFlag(target.child)
//                                || intercepted;
//                        if (dispatchTransformedTouchEvent(ev, cancelChild,
//                                target.child, target.pointerIdBits)) {
//                            handled = true;
//                        }
//                        if (cancelChild) {
//                            if (predecessor == null) {
//                                mFirstTouchTarget = next;
//                            } else {
//                                predecessor.next = next;
//                            }
//                            target.recycle();
//                            target = next;
//                            continue;
//                        }
//                    }
//                    predecessor = target;
//                    target = next;
//                }
//            }
//
//            // Update list of touch targets for pointer up or cancel, if needed.
//            if (canceled
//                    || actionMasked == MotionEvent.ACTION_UP
//                    || actionMasked == MotionEvent.ACTION_HOVER_MOVE) {
//                resetTouchState();
//            } else if (split && actionMasked == MotionEvent.ACTION_POINTER_UP) {
//                final int actionIndex = ev.getActionIndex();
//                final int idBitsToRemove = 1 << ev.getPointerId(actionIndex);
//                removePointersFromTouchTargets(idBitsToRemove);
//            }
//        }
//
//        if (!handled && mInputEventConsistencyVerifier != null) {
//            mInputEventConsistencyVerifier.onUnhandledEvent(ev, 1);
//        }
//        return handled;
//    }
//
//    /**
//     * Provide custom ordering of views in which the touch will be dispatched.
//     *
//     * This is called within a tight loop, so you are not allowed to allocate objects, including
//     * the return array. Instead, you should return a pre-allocated list that will be cleared
//     * after the dispatch is finished.
//     * @hide
//     */
//    public ArrayList<View> buildTouchDispatchChildList() {
//        return buildOrderedChildList();
//    }
//
//    /**
//     * Finds the child which has accessibility focus.
//     *
//     * @return The child that has focus.
//     */
//    private View findChildWithAccessibilityFocus() {
//        ViewRootImpl viewRoot = getViewRootImpl();
//        if (viewRoot == null) {
//            return null;
//        }
//
//        View current = viewRoot.getAccessibilityFocusedHost();
//        if (current == null) {
//            return null;
//        }
//
//        ViewParent parent = current.getParent();
//        while (parent instanceof View) {
//            if (parent == this) {
//                return current;
//            }
//            current = (View) parent;
//            parent = current.getParent();
//        }
//
//        return null;
//    }
//
//    /**
//     * Resets all touch state in preparation for a new cycle.
//     */
//    private void resetTouchState() {
//        clearTouchTargets();
//        resetCancelNextUpFlag(this);
//        mGroupFlags &= ~FLAG_DISALLOW_INTERCEPT;
//        mNestedScrollAxes = SCROLL_AXIS_NONE;
//    }
//
//    /**
//     * Resets the cancel next up flag.
//     * Returns true if the flag was previously set.
//     */
//    private static boolean resetCancelNextUpFlag(@NonNull View view) {
//        if ((view.mPrivateFlags & PFLAG_CANCEL_NEXT_UP_EVENT) != 0) {
//            view.mPrivateFlags &= ~PFLAG_CANCEL_NEXT_UP_EVENT;
//            return true;
//        }
//        return false;
//    }
//
//    /**
//     * Clears all touch targets.
//     */
//    private void clearTouchTargets() {
//        TouchTarget target = mFirstTouchTarget;
//        if (target != null) {
//            do {
//                TouchTarget next = target.next;
//                target.recycle();
//                target = next;
//            } while (target != null);
//            mFirstTouchTarget = null;
//        }
//    }
//
//    /**
//     * Cancels and clears all touch targets.
//     */
//    private void cancelAndClearTouchTargets(MotionEvent event) {
//        if (mFirstTouchTarget != null) {
//            boolean syntheticEvent = false;
//            if (event == null) {
//                final long now = SystemClock.uptimeMillis();
//                event = MotionEvent.obtain(now, now,
//                        MotionEvent.ACTION_CANCEL, 0.0f, 0.0f, 0);
//                event.setSource(InputDevice.SOURCE_TOUCHSCREEN);
//                syntheticEvent = true;
//            }
//
//            for (TouchTarget target = mFirstTouchTarget; target != null; target = target.next) {
//                resetCancelNextUpFlag(target.child);
//                dispatchTransformedTouchEvent(event, true, target.child, target.pointerIdBits);
//            }
//            clearTouchTargets();
//
//            if (syntheticEvent) {
//                event.recycle();
//            }
//        }
//    }
//
//    /**
//     * Gets the touch target for specified child view.
//     * Returns null if not found.
//     */
//    private TouchTarget getTouchTarget(@NonNull View child) {
//        for (TouchTarget target = mFirstTouchTarget; target != null; target = target.next) {
//            if (target.child == child) {
//                return target;
//            }
//        }
//        return null;
//    }
//
//    /**
//     * Adds a touch target for specified child to the beginning of the list.
//     * Assumes the target child is not already present.
//     */
//    private TouchTarget addTouchTarget(@NonNull View child, int pointerIdBits) {
//        final TouchTarget target = TouchTarget.obtain(child, pointerIdBits);
//        target.next = mFirstTouchTarget;
//        mFirstTouchTarget = target;
//        return target;
//    }
//
//    /**
//     * Removes the pointer ids from consideration.
//     */
//    private void removePointersFromTouchTargets(int pointerIdBits) {
//        TouchTarget predecessor = null;
//        TouchTarget target = mFirstTouchTarget;
//        while (target != null) {
//            final TouchTarget next = target.next;
//            if ((target.pointerIdBits & pointerIdBits) != 0) {
//                target.pointerIdBits &= ~pointerIdBits;
//                if (target.pointerIdBits == 0) {
//                    if (predecessor == null) {
//                        mFirstTouchTarget = next;
//                    } else {
//                        predecessor.next = next;
//                    }
//                    target.recycle();
//                    target = next;
//                    continue;
//                }
//            }
//            predecessor = target;
//            target = next;
//        }
//    }
//
//    @UnsupportedAppUsage
//    private void cancelTouchTarget(View view) {
//        TouchTarget predecessor = null;
//        TouchTarget target = mFirstTouchTarget;
//        while (target != null) {
//            final TouchTarget next = target.next;
//            if (target.child == view) {
//                if (predecessor == null) {
//                    mFirstTouchTarget = next;
//                } else {
//                    predecessor.next = next;
//                }
//                target.recycle();
//
//                final long now = SystemClock.uptimeMillis();
//                MotionEvent event = MotionEvent.obtain(now, now,
//                        MotionEvent.ACTION_CANCEL, 0.0f, 0.0f, 0);
//                event.setSource(InputDevice.SOURCE_TOUCHSCREEN);
//                view.dispatchTouchEvent(event);
//                event.recycle();
//                return;
//            }
//            predecessor = target;
//            target = next;
//        }
//    }
//
//    private Rect getTempRect() {
//        if (mTempRect == null) {
//            mTempRect = new Rect();
//        }
//        return mTempRect;
//    }
//
//    private float[] getTempLocationF() {
//        if (mTempPosition == null) {
//            mTempPosition = new float[2];
//        }
//        return mTempPosition;
//    }
//
//    private Point getTempPoint() {
//        if (mTempPoint == null) {
//            mTempPoint = new Point();
//        }
//        return mTempPoint;
//    }
//
//    /**
//     * Returns true if a child view contains the specified point when transformed
//     * into its coordinate space.
//     * Child must not be null.
//     * @hide
//     */
//    @UnsupportedAppUsage
//    protected boolean isTransformedTouchPointInView(float x, float y, View child,
//                                                    PointF outLocalPoint) {
//        final float[] point = getTempLocationF();
//        point[0] = x;
//        point[1] = y;
//        transformPointToViewLocal(point, child);
//        final boolean isInView = child.pointInView(point[0], point[1]);
//        if (isInView && outLocalPoint != null) {
//            outLocalPoint.set(point[0], point[1]);
//        }
//        return isInView;
//    }
//
//    /**
//     * @hide
//     */
//    @UnsupportedAppUsage
//    public void transformPointToViewLocal(float[] point, View child) {
//        point[0] += mScrollX - child.mLeft;
//        point[1] += mScrollY - child.mTop;
//
//        if (!child.hasIdentityMatrix()) {
//            child.getInverseMatrix().mapPoints(point);
//        }
//    }
//
//    /**
//     * Transforms a motion event into the coordinate space of a particular child view,
//     * filters out irrelevant pointer ids, and overrides its action if necessary.
//     * If child is null, assumes the MotionEvent will be sent to this ViewGroup instead.
//     */
//    private boolean dispatchTransformedTouchEvent(MotionEvent event, boolean cancel,
//                                                  View child, int desiredPointerIdBits) {
//        final boolean handled;
//
//        // Canceling motions is a special case.  We don't need to perform any transformations
//        // or filtering.  The important part is the action, not the contents.
//        final int oldAction = event.getAction();
//        if (cancel || oldAction == MotionEvent.ACTION_CANCEL) {
//            event.setAction(MotionEvent.ACTION_CANCEL);
//            if (child == null) {
//                handled = super.dispatchTouchEvent(event);
//            } else {
//                handled = child.dispatchTouchEvent(event);
//            }
//            event.setAction(oldAction);
//            return handled;
//        }
//
//        // Calculate the number of pointers to deliver.
//        final int oldPointerIdBits = event.getPointerIdBits();
//        final int newPointerIdBits = oldPointerIdBits & desiredPointerIdBits;
//
//        // If for some reason we ended up in an inconsistent state where it looks like we
//        // might produce a motion event with no pointers in it, then drop the event.
//        if (newPointerIdBits == 0) {
//            return false;
//        }
//
//        // If the number of pointers is the same and we don't need to perform any fancy
//        // irreversible transformations, then we can reuse the motion event for this
//        // dispatch as long as we are careful to revert any changes we make.
//        // Otherwise we need to make a copy.
//        final MotionEvent transformedEvent;
//        if (newPointerIdBits == oldPointerIdBits) {
//            if (child == null || child.hasIdentityMatrix()) {
//                if (child == null) {
//                    handled = super.dispatchTouchEvent(event);
//                } else {
//                    final float offsetX = mScrollX - child.mLeft;
//                    final float offsetY = mScrollY - child.mTop;
//                    event.offsetLocation(offsetX, offsetY);
//
//                    handled = child.dispatchTouchEvent(event);
//
//                    event.offsetLocation(-offsetX, -offsetY);
//                }
//                return handled;
//            }
//            transformedEvent = MotionEvent.obtain(event);
//        } else {
//            transformedEvent = event.split(newPointerIdBits);
//        }
//
//        // Perform any necessary transformations and dispatch.
//        if (child == null) {
//            handled = super.dispatchTouchEvent(transformedEvent);
//        } else {
//            final float offsetX = mScrollX - child.mLeft;
//            final float offsetY = mScrollY - child.mTop;
//            transformedEvent.offsetLocation(offsetX, offsetY);
//            if (! child.hasIdentityMatrix()) {
//                transformedEvent.transform(child.getInverseMatrix());
//            }
//
//            handled = child.dispatchTouchEvent(transformedEvent);
//        }
//
//        // Done.
//        transformedEvent.recycle();
//        return handled;
//    }
//
//    /**
//     * Enable or disable the splitting of MotionEvents to multiple children during touch event
//     * dispatch. This behavior is enabled by default for applications that target an
//     * SDK version of {@link Build.VERSION_CODES#HONEYCOMB} or newer.
//     *
//     * <p>When this option is enabled MotionEvents may be split and dispatched to different child
//     * views depending on where each pointer initially went down. This allows for user interactions
//     * such as scrolling two panes of content independently, chording of buttons, and performing
//     * independent gestures on different pieces of content.
//     *
//     * @param split <code>true</code> to allow MotionEvents to be split and dispatched to multiple
//     *              child views. <code>false</code> to only allow one child view to be the target of
//     *              any MotionEvent received by this ViewGroup.
//     * @attr ref android.R.styleable#ViewGroup_splitMotionEvents
//     */
//    public void setMotionEventSplittingEnabled(boolean split) {
//        // TODO Applications really shouldn't change this setting mid-touch event,
//        // but perhaps this should handle that case and send ACTION_CANCELs to any child views
//        // with gestures in progress when this is changed.
//        if (split) {
//            mGroupFlags |= FLAG_SPLIT_MOTION_EVENTS;
//        } else {
//            mGroupFlags &= ~FLAG_SPLIT_MOTION_EVENTS;
//        }
//    }
//
//    /**
//     * Returns true if MotionEvents dispatched to this ViewGroup can be split to multiple children.
//     * @return true if MotionEvents dispatched to this ViewGroup can be split to multiple children.
//     */
//    @InspectableProperty(name = "splitMotionEvents")
//    public boolean isMotionEventSplittingEnabled() {
//        return (mGroupFlags & FLAG_SPLIT_MOTION_EVENTS) == FLAG_SPLIT_MOTION_EVENTS;
//    }
//
//    /**
//     * Returns true if this ViewGroup should be considered as a single entity for removal
//     * when executing an Activity transition. If this is false, child elements will move
//     * individually during the transition.
//     *
//     * @return True if the ViewGroup should be acted on together during an Activity transition.
//     * The default value is true when there is a non-null background or if
//     * {@link #getTransitionName()} is not null or if a
//     * non-null {@link ViewOutlineProvider} other than
//     * {@link ViewOutlineProvider#BACKGROUND} was given to
//     * {@link #setOutlineProvider(ViewOutlineProvider)} and false otherwise.
//     */
//    @InspectableProperty
//    public boolean isTransitionGroup() {
//        if ((mGroupFlags & FLAG_IS_TRANSITION_GROUP_SET) != 0) {
//            return ((mGroupFlags & FLAG_IS_TRANSITION_GROUP) != 0);
//        } else {
//            final ViewOutlineProvider outlineProvider = getOutlineProvider();
//            return getBackground() != null || getTransitionName() != null ||
//                    (outlineProvider != null && outlineProvider != ViewOutlineProvider.BACKGROUND);
//        }
//    }
//
//    /**
//     * Changes whether or not this ViewGroup should be treated as a single entity during
//     * Activity Transitions.
//     * @param isTransitionGroup Whether or not the ViewGroup should be treated as a unit
//     *                          in Activity transitions. If false, the ViewGroup won't transition,
//     *                          only its children. If true, the entire ViewGroup will transition
//     *                          together.
//     * @see android.app.ActivityOptions#makeSceneTransitionAnimation(android.app.Activity,
//     * android.util.Pair[])
//     */
//    public void setTransitionGroup(boolean isTransitionGroup) {
//        mGroupFlags |= FLAG_IS_TRANSITION_GROUP_SET;
//        if (isTransitionGroup) {
//            mGroupFlags |= FLAG_IS_TRANSITION_GROUP;
//        } else {
//            mGroupFlags &= ~FLAG_IS_TRANSITION_GROUP;
//        }
//    }
//
//    @Override
//    public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) {
//
//        if (disallowIntercept == ((mGroupFlags & FLAG_DISALLOW_INTERCEPT) != 0)) {
//            // We're already in this state, assume our ancestors are too
//            return;
//        }
//
//        if (disallowIntercept) {
//            mGroupFlags |= FLAG_DISALLOW_INTERCEPT;
//        } else {
//            mGroupFlags &= ~FLAG_DISALLOW_INTERCEPT;
//        }
//
//        // Pass it up to our parent
//        if (mParent != null) {
//            mParent.requestDisallowInterceptTouchEvent(disallowIntercept);
//        }
//    }
//
//    /**
//     * Implement this method to intercept all touch screen motion events.  This
//     * allows you to watch events as they are dispatched to your children, and
//     * take ownership of the current gesture at any point.
//     *
//     * <p>Using this function takes some care, as it has a fairly complicated
//     * interaction with {@link View#onTouchEvent(MotionEvent)
//     * View.onTouchEvent(MotionEvent)}, and using it requires implementing
//     * that method as well as this one in the correct way.  Events will be
//     * received in the following order:
//     *
//     * <ol>
//     * <li> You will receive the down event here.
//     * <li> The down event will be handled either by a child of this view
//     * group, or given to your own onTouchEvent() method to handle; this means
//     * you should implement onTouchEvent() to return true, so you will
//     * continue to see the rest of the gesture (instead of looking for
//     * a parent view to handle it).  Also, by returning true from
//     * onTouchEvent(), you will not receive any following
//     * events in onInterceptTouchEvent() and all touch processing must
//     * happen in onTouchEvent() like normal.
//     * <li> For as long as you return false from this function, each following
//     * event (up to and including the final up) will be delivered first here
//     * and then to the target's onTouchEvent().
//     * <li> If you return true from here, you will not receive any
//     * following events: the target view will receive the same event but
//     * with the action {@link MotionEvent#ACTION_CANCEL}, and all further
//     * events will be delivered to your onTouchEvent() method and no longer
//     * appear here.
//     * </ol>
//     *
//     * @param ev The motion event being dispatched down the hierarchy.
//     * @return Return true to steal motion events from the children and have
//     * them dispatched to this ViewGroup through onTouchEvent().
//     * The current target will receive an ACTION_CANCEL event, and no further
//     * messages will be delivered here.
//     */
//    public boolean onInterceptTouchEvent(MotionEvent ev) {
//        if (ev.isFromSource(InputDevice.SOURCE_MOUSE)
//                && ev.getAction() == MotionEvent.ACTION_DOWN
//                && ev.isButtonPressed(MotionEvent.BUTTON_PRIMARY)
//                && isOnScrollbarThumb(ev.getX(), ev.getY())) {
//            return true;
//        }
//        return false;
//    }
//
//    /**
//     * {@inheritDoc}
//     *
//     * Looks for a view to give focus to respecting the setting specified by
//     * {@link #getDescendantFocusability()}.
//     *
//     * Uses {@link #onRequestFocusInDescendants(int, Rect)} to
//     * find focus within the children of this group when appropriate.
//     *
//     * @see #FOCUS_BEFORE_DESCENDANTS
//     * @see #FOCUS_AFTER_DESCENDANTS
//     * @see #FOCUS_BLOCK_DESCENDANTS
//     * @see #onRequestFocusInDescendants(int, Rect)
//     */
//    @Override
//    public boolean requestFocus(int direction, Rect previouslyFocusedRect) {
//        if (DBG) {
//            System.out.println(this + " ViewGroup.requestFocus direction="
//                    + direction);
//        }
//        int descendantFocusability = getDescendantFocusability();
//
//        boolean result;
//        switch (descendantFocusability) {
//            case FOCUS_BLOCK_DESCENDANTS:
//                result = super.requestFocus(direction, previouslyFocusedRect);
//                break;
//            case FOCUS_BEFORE_DESCENDANTS: {
//                final boolean took = super.requestFocus(direction, previouslyFocusedRect);
//                result = took ? took : onRequestFocusInDescendants(direction,
//                        previouslyFocusedRect);
//                break;
//            }
//            case FOCUS_AFTER_DESCENDANTS: {
//                final boolean took = onRequestFocusInDescendants(direction, previouslyFocusedRect);
//                result = took ? took : super.requestFocus(direction, previouslyFocusedRect);
//                break;
//            }
//            default:
//                throw new IllegalStateException(
//                        "descendant focusability must be one of FOCUS_BEFORE_DESCENDANTS,"
//                                + " FOCUS_AFTER_DESCENDANTS, FOCUS_BLOCK_DESCENDANTS but is "
//                                + descendantFocusability);
//        }
//        if (result && !isLayoutValid() && ((mPrivateFlags & PFLAG_WANTS_FOCUS) == 0)) {
//            mPrivateFlags |= PFLAG_WANTS_FOCUS;
//        }
//        return result;
//    }
//
//    /**
//     * Look for a descendant to call {@link View#requestFocus} on.
//     * Called by {@link android.view.ViewGroup#requestFocus(int, Rect)}
//     * when it wants to request focus within its children.  Override this to
//     * customize how your {@link android.view.ViewGroup} requests focus within its children.
//     * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
//     * @param previouslyFocusedRect The rectangle (in this View's coordinate system)
//     *        to give a finer grained hint about where focus is coming from.  May be null
//     *        if there is no hint.
//     * @return Whether focus was taken.
//     */
//    @SuppressWarnings({"ConstantConditions"})
//    protected boolean onRequestFocusInDescendants(int direction,
//                                                  Rect previouslyFocusedRect) {
//        int index;
//        int increment;
//        int end;
//        int count = mChildrenCount;
//        if ((direction & FOCUS_FORWARD) != 0) {
//            index = 0;
//            increment = 1;
//            end = count;
//        } else {
//            index = count - 1;
//            increment = -1;
//            end = -1;
//        }
//        final View[] children = mChildren;
//        for (int i = index; i != end; i += increment) {
//            View child = children[i];
//            if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
//                if (child.requestFocus(direction, previouslyFocusedRect)) {
//                    return true;
//                }
//            }
//        }
//        return false;
//    }
//
//    @Override
//    public boolean restoreDefaultFocus() {
//        if (mDefaultFocus != null
//                && getDescendantFocusability() != FOCUS_BLOCK_DESCENDANTS
//                && (mDefaultFocus.mViewFlags & VISIBILITY_MASK) == VISIBLE
//                && mDefaultFocus.restoreDefaultFocus()) {
//            return true;
//        }
//        return super.restoreDefaultFocus();
//    }
//
//    /**
//     * @hide
//     */
//    @TestApi
//    @Override
//    public boolean restoreFocusInCluster(@FocusRealDirection int direction) {
//        // Allow cluster-navigation to enter touchscreenBlocksFocus ViewGroups.
//        if (isKeyboardNavigationCluster()) {
//            final boolean blockedFocus = getTouchscreenBlocksFocus();
//            try {
//                setTouchscreenBlocksFocusNoRefocus(false);
//                return restoreFocusInClusterInternal(direction);
//            } finally {
//                setTouchscreenBlocksFocusNoRefocus(blockedFocus);
//            }
//        } else {
//            return restoreFocusInClusterInternal(direction);
//        }
//    }
//
//    private boolean restoreFocusInClusterInternal(@FocusRealDirection int direction) {
//        if (mFocusedInCluster != null && getDescendantFocusability() != FOCUS_BLOCK_DESCENDANTS
//                && (mFocusedInCluster.mViewFlags & VISIBILITY_MASK) == VISIBLE
//                && mFocusedInCluster.restoreFocusInCluster(direction)) {
//            return true;
//        }
//        return super.restoreFocusInCluster(direction);
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public boolean restoreFocusNotInCluster() {
//        if (mFocusedInCluster != null) {
//            // since clusters don't nest; we can assume that a non-null mFocusedInCluster
//            // will refer to a view not-in a cluster.
//            return restoreFocusInCluster(View.FOCUS_DOWN);
//        }
//        if (isKeyboardNavigationCluster() || (mViewFlags & VISIBILITY_MASK) != VISIBLE) {
//            return false;
//        }
//        int descendentFocusability = getDescendantFocusability();
//        if (descendentFocusability == FOCUS_BLOCK_DESCENDANTS) {
//            return super.requestFocus(FOCUS_DOWN, null);
//        }
//        if (descendentFocusability == FOCUS_BEFORE_DESCENDANTS
//                && super.requestFocus(FOCUS_DOWN, null)) {
//            return true;
//        }
//        for (int i = 0; i < mChildrenCount; ++i) {
//            View child = mChildren[i];
//            if (!child.isKeyboardNavigationCluster()
//                    && child.restoreFocusNotInCluster()) {
//                return true;
//            }
//        }
//        if (descendentFocusability == FOCUS_AFTER_DESCENDANTS && !hasFocusableChild(false)) {
//            return super.requestFocus(FOCUS_DOWN, null);
//        }
//        return false;
//    }
//
//    /**
//     * {@inheritDoc}
//     *
//     * @hide
//     */
//    @Override
//    public void dispatchStartTemporaryDetach() {
//        super.dispatchStartTemporaryDetach();
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchStartTemporaryDetach();
//        }
//    }
//
//    /**
//     * {@inheritDoc}
//     *
//     * @hide
//     */
//    @Override
//    public void dispatchFinishTemporaryDetach() {
//        super.dispatchFinishTemporaryDetach();
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchFinishTemporaryDetach();
//        }
//    }
//
//    @Override
//    @UnsupportedAppUsage
//    void dispatchAttachedToWindow(AttachInfo info, int visibility) {
//        mGroupFlags |= FLAG_PREVENT_DISPATCH_ATTACHED_TO_WINDOW;
//        super.dispatchAttachedToWindow(info, visibility);
//        mGroupFlags &= ~FLAG_PREVENT_DISPATCH_ATTACHED_TO_WINDOW;
//
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            final View child = children[i];
//            child.dispatchAttachedToWindow(info,
//                    combineVisibility(visibility, child.getVisibility()));
//        }
//        final int transientCount = mTransientIndices == null ? 0 : mTransientIndices.size();
//        for (int i = 0; i < transientCount; ++i) {
//            View view = mTransientViews.get(i);
//            view.dispatchAttachedToWindow(info,
//                    combineVisibility(visibility, view.getVisibility()));
//        }
//    }
//
//    @Override
//    void dispatchScreenStateChanged(int screenState) {
//        super.dispatchScreenStateChanged(screenState);
//
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchScreenStateChanged(screenState);
//        }
//    }
//
//    @Override
//    void dispatchMovedToDisplay(Display display, Configuration config) {
//        super.dispatchMovedToDisplay(display, config);
//
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchMovedToDisplay(display, config);
//        }
//    }
//
//    /** @hide */
//    @Override
//    public boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) {
//        boolean handled = false;
//        if (includeForAccessibility()) {
//            handled = super.dispatchPopulateAccessibilityEventInternal(event);
//            if (handled) {
//                return handled;
//            }
//        }
//        // Let our children have a shot in populating the event.
//        ChildListForAccessibility children = ChildListForAccessibility.obtain(this, true);
//        try {
//            final int childCount = children.getChildCount();
//            for (int i = 0; i < childCount; i++) {
//                View child = children.getChildAt(i);
//                if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
//                    handled = child.dispatchPopulateAccessibilityEvent(event);
//                    if (handled) {
//                        return handled;
//                    }
//                }
//            }
//        } finally {
//            children.recycle();
//        }
//        return false;
//    }
//
//    /**
//     * Dispatch creation of {@link ViewStructure} down the hierarchy.  This implementation
//     * adds in all child views of the view group, in addition to calling the default View
//     * implementation.
//     */
//    @Override
//    public void dispatchProvideStructure(ViewStructure structure) {
//        super.dispatchProvideStructure(structure);
//        if (isAssistBlocked() || structure.getChildCount() != 0) {
//            return;
//        }
//        final int childrenCount = mChildrenCount;
//        if (childrenCount <= 0) {
//            return;
//        }
//
//        if (!isLaidOut()) {
//            if (Helper.sVerbose) {
//                Log.v(VIEW_LOG_TAG, "dispatchProvideStructure(): not laid out, ignoring "
//                        + childrenCount + " children of " + getAccessibilityViewId());
//            }
//            return;
//        }
//
//        structure.setChildCount(childrenCount);
//        ArrayList<View> preorderedList = buildOrderedChildList();
//        boolean customOrder = preorderedList == null
//                && isChildrenDrawingOrderEnabled();
//        for (int i = 0; i < childrenCount; i++) {
//            int childIndex;
//            try {
//                childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//            } catch (IndexOutOfBoundsException e) {
//                childIndex = i;
//                if (mContext.getApplicationInfo().targetSdkVersion < Build.VERSION_CODES.M) {
//                    Log.w(TAG, "Bad getChildDrawingOrder while collecting assist @ "
//                            + i + " of " + childrenCount, e);
//                    // At least one app is failing when we call getChildDrawingOrder
//                    // at this point, so deal semi-gracefully with it by falling back
//                    // on the basic order.
//                    customOrder = false;
//                    if (i > 0) {
//                        // If we failed at the first index, there really isn't
//                        // anything to do -- we will just proceed with the simple
//                        // sequence order.
//                        // Otherwise, we failed in the middle, so need to come up
//                        // with an order for the remaining indices and use that.
//                        // Failed at the first one, easy peasy.
//                        int[] permutation = new int[childrenCount];
//                        SparseBooleanArray usedIndices = new SparseBooleanArray();
//                        // Go back and collected the indices we have done so far.
//                        for (int j = 0; j < i; j++) {
//                            permutation[j] = getChildDrawingOrder(childrenCount, j);
//                            usedIndices.put(permutation[j], true);
//                        }
//                        // Fill in the remaining indices with indices that have not
//                        // yet been used.
//                        int nextIndex = 0;
//                        for (int j = i; j < childrenCount; j++) {
//                            while (usedIndices.get(nextIndex, false)) {
//                                nextIndex++;
//                            }
//                            permutation[j] = nextIndex;
//                            nextIndex++;
//                        }
//                        // Build the final view list.
//                        preorderedList = new ArrayList<>(childrenCount);
//                        for (int j = 0; j < childrenCount; j++) {
//                            final int index = permutation[j];
//                            final View child = mChildren[index];
//                            preorderedList.add(child);
//                        }
//                    }
//                } else {
//                    throw e;
//                }
//            }
//            final View child = getAndVerifyPreorderedView(preorderedList, mChildren,
//                    childIndex);
//            final ViewStructure cstructure = structure.newChild(i);
//            child.dispatchProvideStructure(cstructure);
//        }
//        if (preorderedList != null) {
//            preorderedList.clear();
//        }
//    }
//
//    /**
//     * {@inheritDoc}
//     *
//     * <p>This implementation adds in all child views of the view group, in addition to calling the
//     * default {@link View} implementation.
//     */
//    @Override
//    public void dispatchProvideAutofillStructure(ViewStructure structure,
//                                                 @AutofillFlags int flags) {
//        super.dispatchProvideAutofillStructure(structure, flags);
//
//        if (structure.getChildCount() != 0) {
//            return;
//        }
//
//        if (!isLaidOut()) {
//            if (Helper.sVerbose) {
//                Log.v(VIEW_LOG_TAG, "dispatchProvideAutofillStructure(): not laid out, ignoring "
//                        + mChildrenCount + " children of " + getAutofillId());
//            }
//            return;
//        }
//
//        final ChildListForAutoFillOrContentCapture children = getChildrenForAutofill(flags);
//        final int childrenCount = children.size();
//        structure.setChildCount(childrenCount);
//        for (int i = 0; i < childrenCount; i++) {
//            final View child = children.get(i);
//            final ViewStructure cstructure = structure.newChild(i);
//            child.dispatchProvideAutofillStructure(cstructure, flags);
//        }
//        children.recycle();
//    }
//
//    /** @hide */
//    @Override
//    public void dispatchProvideContentCaptureStructure() {
//        super.dispatchProvideContentCaptureStructure();
//
//        if (!isLaidOut()) return;
//
//        final ChildListForAutoFillOrContentCapture children = getChildrenForContentCapture();
//        final int childrenCount = children.size();
//        for (int i = 0; i < childrenCount; i++) {
//            final View child = children.get(i);
//            child.dispatchProvideContentCaptureStructure();
//        }
//        children.recycle();
//    }
//
//    /**
//     * Gets the children for autofill. Children for autofill are the first
//     * level descendants that are important for autofill. The returned
//     * child list object is pooled and the caller must recycle it once done.
//     * @hide */
//    private @NonNull ChildListForAutoFillOrContentCapture getChildrenForAutofill(
//            @AutofillFlags int flags) {
//        final ChildListForAutoFillOrContentCapture children = ChildListForAutoFillOrContentCapture
//                .obtain();
//        populateChildrenForAutofill(children, flags);
//        return children;
//    }
//
//    /** @hide */
//    private void populateChildrenForAutofill(ArrayList<View> list, @AutofillFlags int flags) {
//        final int childrenCount = mChildrenCount;
//        if (childrenCount <= 0) {
//            return;
//        }
//        final ArrayList<View> preorderedList = buildOrderedChildList();
//        final boolean customOrder = preorderedList == null
//                && isChildrenDrawingOrderEnabled();
//        for (int i = 0; i < childrenCount; i++) {
//            final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//            final View child = (preorderedList == null)
//                    ? mChildren[childIndex] : preorderedList.get(childIndex);
//            if ((flags & AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS) != 0
//                    || child.isImportantForAutofill()) {
//                list.add(child);
//            } else if (child instanceof android.view.ViewGroup) {
//                ((android.view.ViewGroup) child).populateChildrenForAutofill(list, flags);
//            }
//        }
//    }
//
//    private @NonNull ChildListForAutoFillOrContentCapture getChildrenForContentCapture() {
//        final ChildListForAutoFillOrContentCapture children = ChildListForAutoFillOrContentCapture
//                .obtain();
//        populateChildrenForContentCapture(children);
//        return children;
//    }
//
//    /** @hide */
//    private void populateChildrenForContentCapture(ArrayList<View> list) {
//        final int childrenCount = mChildrenCount;
//        if (childrenCount <= 0) {
//            return;
//        }
//        final ArrayList<View> preorderedList = buildOrderedChildList();
//        final boolean customOrder = preorderedList == null
//                && isChildrenDrawingOrderEnabled();
//        for (int i = 0; i < childrenCount; i++) {
//            final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//            final View child = (preorderedList == null)
//                    ? mChildren[childIndex] : preorderedList.get(childIndex);
//            if (child.isImportantForContentCapture()) {
//                list.add(child);
//            } else if (child instanceof android.view.ViewGroup) {
//                ((android.view.ViewGroup) child).populateChildrenForContentCapture(list);
//            }
//        }
//    }
//
//    private static View getAndVerifyPreorderedView(ArrayList<View> preorderedList, View[] children,
//                                                   int childIndex) {
//        final View child;
//        if (preorderedList != null) {
//            child = preorderedList.get(childIndex);
//            if (child == null) {
//                throw new RuntimeException("Invalid preorderedList contained null child at index "
//                        + childIndex);
//            }
//        } else {
//            child = children[childIndex];
//        }
//        return child;
//    }
//
//    /** @hide */
//    @Override
//    @UnsupportedAppUsage
//    public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) {
//        super.onInitializeAccessibilityNodeInfoInternal(info);
//        if (getAccessibilityNodeProvider() != null) {
//            return;
//        }
//        if (mAttachInfo != null) {
//            final ArrayList<View> childrenForAccessibility = mAttachInfo.mTempArrayList;
//            childrenForAccessibility.clear();
//            addChildrenForAccessibility(childrenForAccessibility);
//            final int childrenForAccessibilityCount = childrenForAccessibility.size();
//            for (int i = 0; i < childrenForAccessibilityCount; i++) {
//                final View child = childrenForAccessibility.get(i);
//                info.addChildUnchecked(child);
//            }
//            childrenForAccessibility.clear();
//        }
//        info.setAvailableExtraData(Collections.singletonList(
//                AccessibilityNodeInfo.EXTRA_DATA_RENDERING_INFO_KEY));
//    }
//
//    /**
//     * {@inheritDoc}
//     *
//     * @param info The info to which to add the extra data. Never {@code null}.
//     * @param extraDataKey A key specifying the type of extra data to add to the info. The
//     *                     extra data should be added to the {@link Bundle} returned by
//     *                     the info's {@link AccessibilityNodeInfo#getExtras} method. Never
//     *                     {@code null}.
//     * @param arguments A {@link Bundle} holding any arguments relevant for this request. May be
//     *                  {@code null} if the service provided no arguments.
//     *
//     */
//    @Override
//    public void addExtraDataToAccessibilityNodeInfo(@NonNull AccessibilityNodeInfo info,
//                                                    @NonNull String extraDataKey, @Nullable Bundle arguments) {
//        if (extraDataKey.equals(AccessibilityNodeInfo.EXTRA_DATA_RENDERING_INFO_KEY)) {
//            final AccessibilityNodeInfo.ExtraRenderingInfo extraRenderingInfo =
//                    AccessibilityNodeInfo.ExtraRenderingInfo.obtain();
//            extraRenderingInfo.setLayoutSize(getLayoutParams().width, getLayoutParams().height);
//            info.setExtraRenderingInfo(extraRenderingInfo);
//        }
//    }
//
//    @Override
//    public CharSequence getAccessibilityClassName() {
//        return android.view.ViewGroup.class.getName();
//    }
//
//    @Override
//    public void notifySubtreeAccessibilityStateChanged(View child, View source, int changeType) {
//        // If this is a live region, we should send a subtree change event
//        // from this view. Otherwise, we can let it propagate up.
//        if (getAccessibilityLiveRegion() != ACCESSIBILITY_LIVE_REGION_NONE) {
//            notifyViewAccessibilityStateChangedIfNeeded(
//                    AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE);
//        } else if (mParent != null) {
//            try {
//                mParent.notifySubtreeAccessibilityStateChanged(this, source, changeType);
//            } catch (AbstractMethodError e) {
//                Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() +
//                        " does not fully implement ViewParent", e);
//            }
//        }
//    }
//
//    /** @hide */
//    @Override
//    public void notifySubtreeAccessibilityStateChangedIfNeeded() {
//        if (!AccessibilityManager.getInstance(mContext).isEnabled() || mAttachInfo == null) {
//            return;
//        }
//        // If something important for a11y is happening in this subtree, make sure it's dispatched
//        // from a view that is important for a11y so it doesn't get lost.
//        if ((getImportantForAccessibility() != IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS)
//                && !isImportantForAccessibility() && (getChildCount() > 0)) {
//            ViewParent a11yParent = getParentForAccessibility();
//            if (a11yParent instanceof View) {
//                ((View) a11yParent).notifySubtreeAccessibilityStateChangedIfNeeded();
//                return;
//            }
//        }
//        super.notifySubtreeAccessibilityStateChangedIfNeeded();
//    }
//
//    @Override
//    void resetSubtreeAccessibilityStateChanged() {
//        super.resetSubtreeAccessibilityStateChanged();
//        View[] children = mChildren;
//        final int childCount = mChildrenCount;
//        for (int i = 0; i < childCount; i++) {
//            children[i].resetSubtreeAccessibilityStateChanged();
//        }
//    }
//
//    /**
//     * Counts the number of children of this View that will be sent to an accessibility service.
//     *
//     * @return The number of children an {@code AccessibilityNodeInfo} rooted at this View
//     * would have.
//     */
//    int getNumChildrenForAccessibility() {
//        int numChildrenForAccessibility = 0;
//        for (int i = 0; i < getChildCount(); i++) {
//            View child = getChildAt(i);
//            if (child.includeForAccessibility()) {
//                numChildrenForAccessibility++;
//            } else if (child instanceof android.view.ViewGroup) {
//                numChildrenForAccessibility += ((android.view.ViewGroup) child)
//                        .getNumChildrenForAccessibility();
//            }
//        }
//        return numChildrenForAccessibility;
//    }
//
//    /**
//     * {@inheritDoc}
//     *
//     * <p>Subclasses should always call <code>super.onNestedPrePerformAccessibilityAction</code></p>
//     *
//     * @param target The target view dispatching this action
//     * @param action Action being performed; see
//     *               {@link AccessibilityNodeInfo}
//     * @param args Optional action arguments
//     * @return false by default. Subclasses should return true if they handle the event.
//     */
//    @Override
//    public boolean onNestedPrePerformAccessibilityAction(View target, int action, Bundle args) {
//        return false;
//    }
//
//    @Override
//    @UnsupportedAppUsage
//    void dispatchDetachedFromWindow() {
//        // If we still have a touch target, we are still in the process of
//        // dispatching motion events to a child; we need to get rid of that
//        // child to avoid dispatching events to it after the window is torn
//        // down. To make sure we keep the child in a consistent state, we
//        // first send it an ACTION_CANCEL motion event.
//        cancelAndClearTouchTargets(null);
//
//        // Similarly, set ACTION_EXIT to all hover targets and clear them.
//        exitHoverTargets();
//        exitTooltipHoverTargets();
//
//        // In case view is detached while transition is running
//        mLayoutCalledWhileSuppressed = false;
//
//        // Tear down our drag tracking
//        mChildrenInterestedInDrag = null;
//        mIsInterestedInDrag = false;
//        if (mCurrentDragStartEvent != null) {
//            mCurrentDragStartEvent.recycle();
//            mCurrentDragStartEvent = null;
//        }
//
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchDetachedFromWindow();
//        }
//        clearDisappearingChildren();
//        final int transientCount = mTransientViews == null ? 0 : mTransientIndices.size();
//        for (int i = 0; i < transientCount; ++i) {
//            View view = mTransientViews.get(i);
//            view.dispatchDetachedFromWindow();
//        }
//        super.dispatchDetachedFromWindow();
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    protected void internalSetPadding(int left, int top, int right, int bottom) {
//        super.internalSetPadding(left, top, right, bottom);
//
//        if ((mPaddingLeft | mPaddingTop | mPaddingRight | mPaddingBottom) != 0) {
//            mGroupFlags |= FLAG_PADDING_NOT_NULL;
//        } else {
//            mGroupFlags &= ~FLAG_PADDING_NOT_NULL;
//        }
//    }
//
//    @Override
//    protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) {
//        super.dispatchSaveInstanceState(container);
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            View c = children[i];
//            if ((c.mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED) {
//                c.dispatchSaveInstanceState(container);
//            }
//        }
//    }
//
//    /**
//     * Perform dispatching of a {@link #saveHierarchyState(SparseArray)}  freeze()}
//     * to only this view, not to its children.  For use when overriding
//     * {@link #dispatchSaveInstanceState(SparseArray)}  dispatchFreeze()} to allow
//     * subclasses to freeze their own state but not the state of their children.
//     *
//     * @param container the container
//     */
//    protected void dispatchFreezeSelfOnly(SparseArray<Parcelable> container) {
//        super.dispatchSaveInstanceState(container);
//    }
//
//    @Override
//    protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) {
//        super.dispatchRestoreInstanceState(container);
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            View c = children[i];
//            if ((c.mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED) {
//                c.dispatchRestoreInstanceState(container);
//            }
//        }
//    }
//
//    /**
//     * Perform dispatching of a {@link #restoreHierarchyState(SparseArray)}
//     * to only this view, not to its children.  For use when overriding
//     * {@link #dispatchRestoreInstanceState(SparseArray)} to allow
//     * subclasses to thaw their own state but not the state of their children.
//     *
//     * @param container the container
//     */
//    protected void dispatchThawSelfOnly(SparseArray<Parcelable> container) {
//        super.dispatchRestoreInstanceState(container);
//    }
//
//    /**
//     * Enables or disables the drawing cache for each child of this view group.
//     *
//     * @param enabled true to enable the cache, false to dispose of it
//     *
//     * @deprecated The view drawing cache was largely made obsolete with the introduction of
//     * hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
//     * layers are largely unnecessary and can easily result in a net loss in performance due to the
//     * cost of creating and updating the layer. In the rare cases where caching layers are useful,
//     * such as for alpha animations, {@link #setLayerType(int, Paint)} handles this with hardware
//     * rendering. For software-rendered snapshots of a small part of the View hierarchy or
//     * individual Views it is recommended to create a {@link Canvas} from either a {@link Bitmap} or
//     * {@link android.graphics.Picture} and call {@link #draw(Canvas)} on the View. However these
//     * software-rendered usages are discouraged and have compatibility issues with hardware-only
//     * rendering features such as {@link Bitmap.Config#HARDWARE Config.HARDWARE}
//     * bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
//     * reports or unit testing the {@link PixelCopy} API is recommended.
//     */
//    @Deprecated
//    protected void setChildrenDrawingCacheEnabled(boolean enabled) {
//        if (enabled || (mPersistentDrawingCache & PERSISTENT_ALL_CACHES) != PERSISTENT_ALL_CACHES) {
//            final View[] children = mChildren;
//            final int count = mChildrenCount;
//            for (int i = 0; i < count; i++) {
//                children[i].setDrawingCacheEnabled(enabled);
//            }
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public Bitmap createSnapshot(ViewDebug.CanvasProvider canvasProvider, boolean skipChildren) {
//        int count = mChildrenCount;
//        int[] visibilities = null;
//
//        if (skipChildren) {
//            visibilities = new int[count];
//            for (int i = 0; i < count; i++) {
//                View child = getChildAt(i);
//                visibilities[i] = child.getVisibility();
//                if (visibilities[i] == View.VISIBLE) {
//                    child.mViewFlags = (child.mViewFlags & ~View.VISIBILITY_MASK)
//                            | (View.INVISIBLE & View.VISIBILITY_MASK);
//                }
//            }
//        }
//
//        try {
//            return super.createSnapshot(canvasProvider, skipChildren);
//        } finally {
//            if (skipChildren) {
//                for (int i = 0; i < count; i++) {
//                    View child = getChildAt(i);
//                    child.mViewFlags = (child.mViewFlags & ~View.VISIBILITY_MASK)
//                            | (visibilities[i] & View.VISIBILITY_MASK);
//                }
//            }
//        }
//    }
//
//    /** Return true if this ViewGroup is laying out using optical bounds. */
//    boolean isLayoutModeOptical() {
//        return mLayoutMode == LAYOUT_MODE_OPTICAL_BOUNDS;
//    }
//
//    @Override
//    Insets computeOpticalInsets() {
//        if (isLayoutModeOptical()) {
//            int left = 0;
//            int top = 0;
//            int right = 0;
//            int bottom = 0;
//            for (int i = 0; i < mChildrenCount; i++) {
//                View child = getChildAt(i);
//                if (child.getVisibility() == VISIBLE) {
//                    Insets insets = child.getOpticalInsets();
//                    left =   Math.max(left,   insets.left);
//                    top =    Math.max(top,    insets.top);
//                    right =  Math.max(right,  insets.right);
//                    bottom = Math.max(bottom, insets.bottom);
//                }
//            }
//            return Insets.of(left, top, right, bottom);
//        } else {
//            return Insets.NONE;
//        }
//    }
//
//    private static void fillRect(Canvas canvas, Paint paint, int x1, int y1, int x2, int y2) {
//        if (x1 != x2 && y1 != y2) {
//            if (x1 > x2) {
//                int tmp = x1; x1 = x2; x2 = tmp;
//            }
//            if (y1 > y2) {
//                int tmp = y1; y1 = y2; y2 = tmp;
//            }
//            canvas.drawRect(x1, y1, x2, y2, paint);
//        }
//    }
//
//    private static int sign(int x) {
//        return (x >= 0) ? 1 : -1;
//    }
//
//    private static void drawCorner(Canvas c, Paint paint, int x1, int y1, int dx, int dy, int lw) {
//        fillRect(c, paint, x1, y1, x1 + dx, y1 + lw * sign(dy));
//        fillRect(c, paint, x1, y1, x1 + lw * sign(dx), y1 + dy);
//    }
//
//    private static void drawRectCorners(Canvas canvas, int x1, int y1, int x2, int y2, Paint paint,
//                                        int lineLength, int lineWidth) {
//        drawCorner(canvas, paint, x1, y1, lineLength, lineLength, lineWidth);
//        drawCorner(canvas, paint, x1, y2, lineLength, -lineLength, lineWidth);
//        drawCorner(canvas, paint, x2, y1, -lineLength, lineLength, lineWidth);
//        drawCorner(canvas, paint, x2, y2, -lineLength, -lineLength, lineWidth);
//    }
//
//    private static void fillDifference(Canvas canvas,
//                                       int x2, int y2, int x3, int y3,
//                                       int dx1, int dy1, int dx2, int dy2, Paint paint) {
//        int x1 = x2 - dx1;
//        int y1 = y2 - dy1;
//
//        int x4 = x3 + dx2;
//        int y4 = y3 + dy2;
//
//        fillRect(canvas, paint, x1, y1, x4, y2);
//        fillRect(canvas, paint, x1, y2, x2, y3);
//        fillRect(canvas, paint, x3, y2, x4, y3);
//        fillRect(canvas, paint, x1, y3, x4, y4);
//    }
//
//    /**
//     * @hide
//     */
//    protected void onDebugDrawMargins(Canvas canvas, Paint paint) {
//        for (int i = 0; i < getChildCount(); i++) {
//            View c = getChildAt(i);
//            c.getLayoutParams().onDebugDraw(c, canvas, paint);
//        }
//    }
//
//    /**
//     * @hide
//     */
//    protected void onDebugDraw(Canvas canvas) {
//        Paint paint = getDebugPaint();
//
//        // Draw optical bounds
//        {
//            paint.setColor(Color.RED);
//            paint.setStyle(Paint.Style.STROKE);
//
//            for (int i = 0; i < getChildCount(); i++) {
//                View c = getChildAt(i);
//                if (c.getVisibility() != View.GONE) {
//                    Insets insets = c.getOpticalInsets();
//
//                    drawRect(canvas, paint,
//                            c.getLeft() + insets.left,
//                            c.getTop() + insets.top,
//                            c.getRight() - insets.right - 1,
//                            c.getBottom() - insets.bottom - 1);
//                }
//            }
//        }
//
//        // Draw margins
//        {
//            paint.setColor(Color.argb(63, 255, 0, 255));
//            paint.setStyle(Paint.Style.FILL);
//
//            onDebugDrawMargins(canvas, paint);
//        }
//
//        // Draw clip bounds
//        {
//            paint.setColor(DEBUG_CORNERS_COLOR);
//            paint.setStyle(Paint.Style.FILL);
//
//            int lineLength = dipsToPixels(DEBUG_CORNERS_SIZE_DIP);
//            int lineWidth = dipsToPixels(1);
//            for (int i = 0; i < getChildCount(); i++) {
//                View c = getChildAt(i);
//                if (c.getVisibility() != View.GONE) {
//                    drawRectCorners(canvas, c.getLeft(), c.getTop(), c.getRight(), c.getBottom(),
//                            paint, lineLength, lineWidth);
//                }
//            }
//        }
//    }
//
//    @Override
//    protected void dispatchDraw(Canvas canvas) {
//        boolean usingRenderNodeProperties = canvas.isRecordingFor(mRenderNode);
//        final int childrenCount = mChildrenCount;
//        final View[] children = mChildren;
//        int flags = mGroupFlags;
//
//        if ((flags & FLAG_RUN_ANIMATION) != 0 && canAnimate()) {
//            final boolean buildCache = !isHardwareAccelerated();
//            for (int i = 0; i < childrenCount; i++) {
//                final View child = children[i];
//                if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
//                    final android.view.ViewGroup.LayoutParams params = child.getLayoutParams();
//                    attachLayoutAnimationParameters(child, params, i, childrenCount);
//                    bindLayoutAnimation(child);
//                }
//            }
//
//            final LayoutAnimationController controller = mLayoutAnimationController;
//            if (controller.willOverlap()) {
//                mGroupFlags |= FLAG_OPTIMIZE_INVALIDATE;
//            }
//
//            controller.start();
//
//            mGroupFlags &= ~FLAG_RUN_ANIMATION;
//            mGroupFlags &= ~FLAG_ANIMATION_DONE;
//
//            if (mAnimationListener != null) {
//                mAnimationListener.onAnimationStart(controller.getAnimation());
//            }
//        }
//
//        int clipSaveCount = 0;
//        final boolean clipToPadding = (flags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK;
//        if (clipToPadding) {
//            clipSaveCount = canvas.save(Canvas.CLIP_SAVE_FLAG);
//            canvas.clipRect(mScrollX + mPaddingLeft, mScrollY + mPaddingTop,
//                    mScrollX + mRight - mLeft - mPaddingRight,
//                    mScrollY + mBottom - mTop - mPaddingBottom);
//        }
//
//        // We will draw our child's animation, let's reset the flag
//        mPrivateFlags &= ~PFLAG_DRAW_ANIMATION;
//        mGroupFlags &= ~FLAG_INVALIDATE_REQUIRED;
//
//        boolean more = false;
//        final long drawingTime = getDrawingTime();
//
//        if (usingRenderNodeProperties) canvas.insertReorderBarrier();
//        final int transientCount = mTransientIndices == null ? 0 : mTransientIndices.size();
//        int transientIndex = transientCount != 0 ? 0 : -1;
//        // Only use the preordered list if not HW accelerated, since the HW pipeline will do the
//        // draw reordering internally
//        final ArrayList<View> preorderedList = usingRenderNodeProperties
//                ? null : buildOrderedChildList();
//        final boolean customOrder = preorderedList == null
//                && isChildrenDrawingOrderEnabled();
//        for (int i = 0; i < childrenCount; i++) {
//            while (transientIndex >= 0 && mTransientIndices.get(transientIndex) == i) {
//                final View transientChild = mTransientViews.get(transientIndex);
//                if ((transientChild.mViewFlags & VISIBILITY_MASK) == VISIBLE ||
//                        transientChild.getAnimation() != null) {
//                    more |= drawChild(canvas, transientChild, drawingTime);
//                }
//                transientIndex++;
//                if (transientIndex >= transientCount) {
//                    transientIndex = -1;
//                }
//            }
//
//            final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//            final View child = getAndVerifyPreorderedView(preorderedList, children, childIndex);
//            if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE || child.getAnimation() != null) {
//                more |= drawChild(canvas, child, drawingTime);
//            }
//        }
//        while (transientIndex >= 0) {
//            // there may be additional transient views after the normal views
//            final View transientChild = mTransientViews.get(transientIndex);
//            if ((transientChild.mViewFlags & VISIBILITY_MASK) == VISIBLE ||
//                    transientChild.getAnimation() != null) {
//                more |= drawChild(canvas, transientChild, drawingTime);
//            }
//            transientIndex++;
//            if (transientIndex >= transientCount) {
//                break;
//            }
//        }
//        if (preorderedList != null) preorderedList.clear();
//
//        // Draw any disappearing views that have animations
//        if (mDisappearingChildren != null) {
//            final ArrayList<View> disappearingChildren = mDisappearingChildren;
//            final int disappearingCount = disappearingChildren.size() - 1;
//            // Go backwards -- we may delete as animations finish
//            for (int i = disappearingCount; i >= 0; i--) {
//                final View child = disappearingChildren.get(i);
//                more |= drawChild(canvas, child, drawingTime);
//            }
//        }
//        if (usingRenderNodeProperties) canvas.insertInorderBarrier();
//
//        if (isShowingLayoutBounds()) {
//            onDebugDraw(canvas);
//        }
//
//        if (clipToPadding) {
//            canvas.restoreToCount(clipSaveCount);
//        }
//
//        // mGroupFlags might have been updated by drawChild()
//        flags = mGroupFlags;
//
//        if ((flags & FLAG_INVALIDATE_REQUIRED) == FLAG_INVALIDATE_REQUIRED) {
//            invalidate(true);
//        }
//
//        if ((flags & FLAG_ANIMATION_DONE) == 0 && (flags & FLAG_NOTIFY_ANIMATION_LISTENER) == 0 &&
//                mLayoutAnimationController.isDone() && !more) {
//            // We want to erase the drawing cache and notify the listener after the
//            // next frame is drawn because one extra invalidate() is caused by
//            // drawChild() after the animation is over
//            mGroupFlags |= FLAG_NOTIFY_ANIMATION_LISTENER;
//            final Runnable end = new Runnable() {
//                @Override
//                public void run() {
//                    notifyAnimationListener();
//                }
//            };
//            post(end);
//        }
//    }
//
//    /**
//     * Returns the ViewGroupOverlay for this view group, creating it if it does
//     * not yet exist. In addition to {@link ViewOverlay}'s support for drawables,
//     * {@link ViewGroupOverlay} allows views to be added to the overlay. These
//     * views, like overlay drawables, are visual-only; they do not receive input
//     * events and should not be used as anything other than a temporary
//     * representation of a view in a parent container, such as might be used
//     * by an animation effect.
//     *
//     * <p>Note: Overlays do not currently work correctly with {@link
//     * SurfaceView} or {@link TextureView}; contents in overlays for these
//     * types of views may not display correctly.</p>
//     *
//     * @return The ViewGroupOverlay object for this view.
//     * @see ViewGroupOverlay
//     */
//    @Override
//    public ViewGroupOverlay getOverlay() {
//        if (mOverlay == null) {
//            mOverlay = new ViewGroupOverlay(mContext, this);
//        }
//        return (ViewGroupOverlay) mOverlay;
//    }
//
//    /**
//     * Converts drawing order position to container position. Override this
//     * if you want to change the drawing order of children. By default, it
//     * returns drawingPosition.
//     * <p>
//     * NOTE: In order for this method to be called, you must enable child ordering
//     * first by calling {@link #setChildrenDrawingOrderEnabled(boolean)}.
//     *
//     * @param drawingPosition the drawing order position.
//     * @return the container position of a child for this drawing order position.
//     *
//     * @see #setChildrenDrawingOrderEnabled(boolean)
//     * @see #isChildrenDrawingOrderEnabled()
//     */
//    protected int getChildDrawingOrder(int childCount, int drawingPosition) {
//        return drawingPosition;
//    }
//
//    /**
//     * Converts drawing order position to container position.
//     * <p>
//     * Children are not necessarily drawn in the order in which they appear in the container.
//     * ViewGroups can enable a custom ordering via {@link #setChildrenDrawingOrderEnabled(boolean)}.
//     * This method returns the container position of a child that appears in the given position
//     * in the current drawing order.
//     *
//     * @param drawingPosition the drawing order position.
//     * @return the container position of a child for this drawing order position.
//     *
//     * @see #getChildDrawingOrder(int, int)}
//     */
//    public final int getChildDrawingOrder(int drawingPosition) {
//        return getChildDrawingOrder(getChildCount(), drawingPosition);
//    }
//
//    private boolean hasChildWithZ() {
//        for (int i = 0; i < mChildrenCount; i++) {
//            if (mChildren[i].getZ() != 0) return true;
//        }
//        return false;
//    }
//
//    /**
//     * Populates (and returns) mPreSortedChildren with a pre-ordered list of the View's children,
//     * sorted first by Z, then by child drawing order (if applicable). This list must be cleared
//     * after use to avoid leaking child Views.
//     *
//     * Uses a stable, insertion sort which is commonly O(n) for ViewGroups with very few elevated
//     * children.
//     */
//    ArrayList<View> buildOrderedChildList() {
//        final int childrenCount = mChildrenCount;
//        if (childrenCount <= 1 || !hasChildWithZ()) return null;
//
//        if (mPreSortedChildren == null) {
//            mPreSortedChildren = new ArrayList<>(childrenCount);
//        } else {
//            // callers should clear, so clear shouldn't be necessary, but for safety...
//            mPreSortedChildren.clear();
//            mPreSortedChildren.ensureCapacity(childrenCount);
//        }
//
//        final boolean customOrder = isChildrenDrawingOrderEnabled();
//        for (int i = 0; i < childrenCount; i++) {
//            // add next child (in child order) to end of list
//            final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//            final View nextChild = mChildren[childIndex];
//            final float currentZ = nextChild.getZ();
//
//            // insert ahead of any Views with greater Z
//            int insertIndex = i;
//            while (insertIndex > 0 && mPreSortedChildren.get(insertIndex - 1).getZ() > currentZ) {
//                insertIndex--;
//            }
//            mPreSortedChildren.add(insertIndex, nextChild);
//        }
//        return mPreSortedChildren;
//    }
//
//    private void notifyAnimationListener() {
//        mGroupFlags &= ~FLAG_NOTIFY_ANIMATION_LISTENER;
//        mGroupFlags |= FLAG_ANIMATION_DONE;
//
//        if (mAnimationListener != null) {
//            final Runnable end = new Runnable() {
//                @Override
//                public void run() {
//                    mAnimationListener.onAnimationEnd(mLayoutAnimationController.getAnimation());
//                }
//            };
//            post(end);
//        }
//
//        invalidate(true);
//    }
//
//    /**
//     * This method is used to cause children of this ViewGroup to restore or recreate their
//     * display lists. It is called by getDisplayList() when the parent ViewGroup does not need
//     * to recreate its own display list, which would happen if it went through the normal
//     * draw/dispatchDraw mechanisms.
//     *
//     * @hide
//     */
//    @Override
//    @UnsupportedAppUsage
//    protected void dispatchGetDisplayList() {
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            final View child = children[i];
//            if (((child.mViewFlags & VISIBILITY_MASK) == VISIBLE || child.getAnimation() != null)) {
//                recreateChildDisplayList(child);
//            }
//        }
//        final int transientCount = mTransientViews == null ? 0 : mTransientIndices.size();
//        for (int i = 0; i < transientCount; ++i) {
//            View child = mTransientViews.get(i);
//            if (((child.mViewFlags & VISIBILITY_MASK) == VISIBLE || child.getAnimation() != null)) {
//                recreateChildDisplayList(child);
//            }
//        }
//        if (mOverlay != null) {
//            View overlayView = mOverlay.getOverlayView();
//            recreateChildDisplayList(overlayView);
//        }
//        if (mDisappearingChildren != null) {
//            final ArrayList<View> disappearingChildren = mDisappearingChildren;
//            final int disappearingCount = disappearingChildren.size();
//            for (int i = 0; i < disappearingCount; ++i) {
//                final View child = disappearingChildren.get(i);
//                recreateChildDisplayList(child);
//            }
//        }
//    }
//
//    private void recreateChildDisplayList(View child) {
//        child.mRecreateDisplayList = (child.mPrivateFlags & PFLAG_INVALIDATED) != 0;
//        child.mPrivateFlags &= ~PFLAG_INVALIDATED;
//        child.updateDisplayListIfDirty();
//        child.mRecreateDisplayList = false;
//    }
//
//    /**
//     * Draw one child of this View Group. This method is responsible for getting
//     * the canvas in the right state. This includes clipping, translating so
//     * that the child's scrolled origin is at 0, 0, and applying any animation
//     * transformations.
//     *
//     * @param canvas The canvas on which to draw the child
//     * @param child Who to draw
//     * @param drawingTime The time at which draw is occurring
//     * @return True if an invalidate() was issued
//     */
//    protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
//        return child.draw(canvas, this, drawingTime);
//    }
//
//    @Override
//    void getScrollIndicatorBounds(@NonNull Rect out) {
//        super.getScrollIndicatorBounds(out);
//
//        // If we have padding and we're supposed to clip children to that
//        // padding, offset the scroll indicators to match our clip bounds.
//        final boolean clipToPadding = (mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK;
//        if (clipToPadding) {
//            out.left += mPaddingLeft;
//            out.right -= mPaddingRight;
//            out.top += mPaddingTop;
//            out.bottom -= mPaddingBottom;
//        }
//    }
//
//    /**
//     * Returns whether this group's children are clipped to their bounds before drawing.
//     * The default value is true.
//     * @see #setClipChildren(boolean)
//     *
//     * @return True if the group's children will be clipped to their bounds,
//     * false otherwise.
//     */
//    @ViewDebug.ExportedProperty(category = "drawing")
//    @InspectableProperty
//    public boolean getClipChildren() {
//        return ((mGroupFlags & FLAG_CLIP_CHILDREN) != 0);
//    }
//
//    /**
//     * By default, children are clipped to their bounds before drawing. This
//     * allows view groups to override this behavior for animations, etc.
//     *
//     * @param clipChildren true to clip children to their bounds,
//     *        false otherwise
//     * @attr ref android.R.styleable#ViewGroup_clipChildren
//     */
//    public void setClipChildren(boolean clipChildren) {
//        boolean previousValue = (mGroupFlags & FLAG_CLIP_CHILDREN) == FLAG_CLIP_CHILDREN;
//        if (clipChildren != previousValue) {
//            setBooleanFlag(FLAG_CLIP_CHILDREN, clipChildren);
//            for (int i = 0; i < mChildrenCount; ++i) {
//                View child = getChildAt(i);
//                if (child.mRenderNode != null) {
//                    child.mRenderNode.setClipToBounds(clipChildren);
//                }
//            }
//            invalidate(true);
//        }
//    }
//
//    /**
//     * Sets whether this ViewGroup will clip its children to its padding and resize (but not
//     * clip) any EdgeEffect to the padded region, if padding is present.
//     * <p>
//     * By default, children are clipped to the padding of their parent
//     * ViewGroup. This clipping behavior is only enabled if padding is non-zero.
//     *
//     * @param clipToPadding true to clip children to the padding of the group, and resize (but
//     *        not clip) any EdgeEffect to the padded region. False otherwise.
//     * @attr ref android.R.styleable#ViewGroup_clipToPadding
//     */
//    public void setClipToPadding(boolean clipToPadding) {
//        if (hasBooleanFlag(FLAG_CLIP_TO_PADDING) != clipToPadding) {
//            setBooleanFlag(FLAG_CLIP_TO_PADDING, clipToPadding);
//            invalidate(true);
//        }
//    }
//
//    /**
//     * Returns whether this ViewGroup will clip its children to its padding, and resize (but
//     * not clip) any EdgeEffect to the padded region, if padding is present.
//     * <p>
//     * By default, children are clipped to the padding of their parent
//     * Viewgroup. This clipping behavior is only enabled if padding is non-zero.
//     *
//     * @return true if this ViewGroup clips children to its padding and resizes (but doesn't
//     *         clip) any EdgeEffect to the padded region, false otherwise.
//     *
//     * @attr ref android.R.styleable#ViewGroup_clipToPadding
//     */
//    @ViewDebug.ExportedProperty(category = "drawing")
//    @InspectableProperty
//    public boolean getClipToPadding() {
//        return hasBooleanFlag(FLAG_CLIP_TO_PADDING);
//    }
//
//    @Override
//    public void dispatchSetSelected(boolean selected) {
//        final View[] children = mChildren;
//        final int count = mChildrenCount;
//        for (int i = 0; i < count; i++) {
//            children[i].setSelected(selected);
//        }
//    }
//
//    @Override
//    public void dispatchSetActivated(boolean activated) {
//        final View[] children = mChildren;
//        final int count = mChildrenCount;
//        for (int i = 0; i < count; i++) {
//            children[i].setActivated(activated);
//        }
//    }
//
//    @Override
//    protected void dispatchSetPressed(boolean pressed) {
//        final View[] children = mChildren;
//        final int count = mChildrenCount;
//        for (int i = 0; i < count; i++) {
//            final View child = children[i];
//            // Children that are clickable on their own should not
//            // show a pressed state when their parent view does.
//            // Clearing a pressed state always propagates.
//            if (!pressed || (!child.isClickable() && !child.isLongClickable())) {
//                child.setPressed(pressed);
//            }
//        }
//    }
//
//    /**
//     * Dispatches drawable hotspot changes to child views that meet at least
//     * one of the following criteria:
//     * <ul>
//     *     <li>Returns {@code false} from both {@link View#isClickable()} and
//     *     {@link View#isLongClickable()}</li>
//     *     <li>Requests duplication of parent state via
//     *     {@link View#setDuplicateParentStateEnabled(boolean)}</li>
//     * </ul>
//     *
//     * @param x hotspot x coordinate
//     * @param y hotspot y coordinate
//     * @see #drawableHotspotChanged(float, float)
//     */
//    @Override
//    public void dispatchDrawableHotspotChanged(float x, float y) {
//        final int count = mChildrenCount;
//        if (count == 0) {
//            return;
//        }
//
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            final View child = children[i];
//            // Children that are clickable on their own should not
//            // receive hotspots when their parent view does.
//            final boolean nonActionable = !child.isClickable() && !child.isLongClickable();
//            final boolean duplicatesState = (child.mViewFlags & DUPLICATE_PARENT_STATE) != 0;
//            if (nonActionable || duplicatesState) {
//                final float[] point = getTempLocationF();
//                point[0] = x;
//                point[1] = y;
//                transformPointToViewLocal(point, child);
//                child.drawableHotspotChanged(point[0], point[1]);
//            }
//        }
//    }
//
//    @Override
//    void dispatchCancelPendingInputEvents() {
//        super.dispatchCancelPendingInputEvents();
//
//        final View[] children = mChildren;
//        final int count = mChildrenCount;
//        for (int i = 0; i < count; i++) {
//            children[i].dispatchCancelPendingInputEvents();
//        }
//    }
//
//    /**
//     * When this property is set to true, this ViewGroup supports static transformations on
//     * children; this causes
//     * {@link #getChildStaticTransformation(View, Transformation)} to be
//     * invoked when a child is drawn.
//     *
//     * Any subclass overriding
//     * {@link #getChildStaticTransformation(View, Transformation)} should
//     * set this property to true.
//     *
//     * @param enabled True to enable static transformations on children, false otherwise.
//     *
//     * @see #getChildStaticTransformation(View, Transformation)
//     */
//    protected void setStaticTransformationsEnabled(boolean enabled) {
//        setBooleanFlag(FLAG_SUPPORT_STATIC_TRANSFORMATIONS, enabled);
//    }
//
//    /**
//     * Sets  <code>t</code> to be the static transformation of the child, if set, returning a
//     * boolean to indicate whether a static transform was set. The default implementation
//     * simply returns <code>false</code>; subclasses may override this method for different
//     * behavior. {@link #setStaticTransformationsEnabled(boolean)} must be set to true
//     * for this method to be called.
//     *
//     * @param child The child view whose static transform is being requested
//     * @param t The Transformation which will hold the result
//     * @return true if the transformation was set, false otherwise
//     * @see #setStaticTransformationsEnabled(boolean)
//     */
//    protected boolean getChildStaticTransformation(View child, Transformation t) {
//        return false;
//    }
//
//    Transformation getChildTransformation() {
//        if (mChildTransformation == null) {
//            mChildTransformation = new Transformation();
//        }
//        return mChildTransformation;
//    }
//
//    /**
//     * {@hide}
//     */
//    @Override
//    protected <T extends View> T findViewTraversal(@IdRes int id) {
//        if (id == mID) {
//            return (T) this;
//        }
//
//        final View[] where = mChildren;
//        final int len = mChildrenCount;
//
//        for (int i = 0; i < len; i++) {
//            View v = where[i];
//
//            if ((v.mPrivateFlags & PFLAG_IS_ROOT_NAMESPACE) == 0) {
//                v = v.findViewById(id);
//
//                if (v != null) {
//                    return (T) v;
//                }
//            }
//        }
//
//        return null;
//    }
//
//    /**
//     * {@hide}
//     */
//    @Override
//    protected <T extends View> T findViewWithTagTraversal(Object tag) {
//        if (tag != null && tag.equals(mTag)) {
//            return (T) this;
//        }
//
//        final View[] where = mChildren;
//        final int len = mChildrenCount;
//
//        for (int i = 0; i < len; i++) {
//            View v = where[i];
//
//            if ((v.mPrivateFlags & PFLAG_IS_ROOT_NAMESPACE) == 0) {
//                v = v.findViewWithTag(tag);
//
//                if (v != null) {
//                    return (T) v;
//                }
//            }
//        }
//
//        return null;
//    }
//
//    /**
//     * {@hide}
//     */
//    @Override
//    protected <T extends View> T findViewByPredicateTraversal(Predicate<View> predicate,
//                                                              View childToSkip) {
//        if (predicate.test(this)) {
//            return (T) this;
//        }
//
//        final View[] where = mChildren;
//        final int len = mChildrenCount;
//
//        for (int i = 0; i < len; i++) {
//            View v = where[i];
//
//            if (v != childToSkip && (v.mPrivateFlags & PFLAG_IS_ROOT_NAMESPACE) == 0) {
//                v = v.findViewByPredicate(predicate);
//
//                if (v != null) {
//                    return (T) v;
//                }
//            }
//        }
//
//        return null;
//    }
//
//    /**
//     * This method adds a view to this container at the specified index purely for the
//     * purposes of allowing that view to draw even though it is not a normal child of
//     * the container. That is, the view does not participate in layout, focus, accessibility,
//     * input, or other normal view operations; it is purely an item to be drawn during the normal
//     * rendering operation of this container. The index that it is added at is the order
//     * in which it will be drawn, with respect to the other views in the container.
//     * For example, a transient view added at index 0 will be drawn before all other views
//     * in the container because it will be drawn first (including before any real view
//     * at index 0). There can be more than one transient view at any particular index;
//     * these views will be drawn in the order in which they were added to the list of
//     * transient views. The index of transient views can also be greater than the number
//     * of normal views in the container; that just means that they will be drawn after all
//     * other views are drawn.
//     *
//     * <p>Note that since transient views do not participate in layout, they must be sized
//     * manually or, more typically, they should just use the size that they had before they
//     * were removed from their container.</p>
//     *
//     * <p>Transient views are useful for handling animations of views that have been removed
//     * from the container, but which should be animated out after the removal. Adding these
//     * views as transient views allows them to participate in drawing without side-effecting
//     * the layout of the container.</p>
//     *
//     * <p>Transient views must always be explicitly {@link #removeTransientView(View) removed}
//     * from the container when they are no longer needed. For example, a transient view
//     * which is added in order to fade it out in its old location should be removed
//     * once the animation is complete.</p>
//     *
//     * @param view The view to be added. The view must not have a parent.
//     * @param index The index at which this view should be drawn, must be >= 0.
//     * This value is relative to the {@link #getChildAt(int) index} values in the normal
//     * child list of this container, where any transient view at a particular index will
//     * be drawn before any normal child at that same index.
//     *
//     * @hide
//     */
//    @UnsupportedAppUsage
//    public void addTransientView(View view, int index) {
//        if (index < 0 || view == null) {
//            return;
//        }
//        if (view.mParent != null) {
//            throw new IllegalStateException("The specified view already has a parent "
//                    + view.mParent);
//        }
//
//        if (mTransientIndices == null) {
//            mTransientIndices = new ArrayList<Integer>();
//            mTransientViews = new ArrayList<View>();
//        }
//        final int oldSize = mTransientIndices.size();
//        if (oldSize > 0) {
//            int insertionIndex;
//            for (insertionIndex = 0; insertionIndex < oldSize; ++insertionIndex) {
//                if (index < mTransientIndices.get(insertionIndex)) {
//                    break;
//                }
//            }
//            mTransientIndices.add(insertionIndex, index);
//            mTransientViews.add(insertionIndex, view);
//        } else {
//            mTransientIndices.add(index);
//            mTransientViews.add(view);
//        }
//        view.mParent = this;
//        if (mAttachInfo != null) {
//            view.dispatchAttachedToWindow(mAttachInfo, (mViewFlags & VISIBILITY_MASK));
//        }
//        invalidate(true);
//    }
//
//    /**
//     * Removes a view from the list of transient views in this container. If there is no
//     * such transient view, this method does nothing.
//     *
//     * @param view The transient view to be removed
//     *
//     * @hide
//     */
//    @UnsupportedAppUsage
//    public void removeTransientView(View view) {
//        if (mTransientViews == null) {
//            return;
//        }
//        final int size = mTransientViews.size();
//        for (int i = 0; i < size; ++i) {
//            if (view == mTransientViews.get(i)) {
//                mTransientViews.remove(i);
//                mTransientIndices.remove(i);
//                view.mParent = null;
//                if (view.mAttachInfo != null) {
//                    view.dispatchDetachedFromWindow();
//                }
//                invalidate(true);
//                return;
//            }
//        }
//    }
//
//    /**
//     * Returns the number of transient views in this container. Specific transient
//     * views and the index at which they were added can be retrieved via
//     * {@link #getTransientView(int)} and {@link #getTransientViewIndex(int)}.
//     *
//     * @see #addTransientView(View, int)
//     * @return The number of transient views in this container
//     *
//     * @hide
//     */
//    @UnsupportedAppUsage
//    public int getTransientViewCount() {
//        return mTransientIndices == null ? 0 : mTransientIndices.size();
//    }
//
//    /**
//     * Given a valid position within the list of transient views, returns the index of
//     * the transient view at that position.
//     *
//     * @param position The position of the index being queried. Must be at least 0
//     * and less than the value returned by {@link #getTransientViewCount()}.
//     * @return The index of the transient view stored in the given position if the
//     * position is valid, otherwise -1
//     *
//     * @hide
//     */
//    public int getTransientViewIndex(int position) {
//        if (position < 0 || mTransientIndices == null || position >= mTransientIndices.size()) {
//            return -1;
//        }
//        return mTransientIndices.get(position);
//    }
//
//    /**
//     * Given a valid position within the list of transient views, returns the
//     * transient view at that position.
//     *
//     * @param position The position of the view being queried. Must be at least 0
//     * and less than the value returned by {@link #getTransientViewCount()}.
//     * @return The transient view stored in the given position if the
//     * position is valid, otherwise null
//     *
//     * @hide
//     */
//    @UnsupportedAppUsage
//    public View getTransientView(int position) {
//        if (mTransientViews == null || position >= mTransientViews.size()) {
//            return null;
//        }
//        return mTransientViews.get(position);
//    }
//
//    /**
//     * <p>Adds a child view. If no layout parameters are already set on the child, the
//     * default parameters for this ViewGroup are set on the child.</p>
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     *
//     * @param child the child view to add
//     *
//     * @see #generateDefaultLayoutParams()
//     */
//    public void addView(View child) {
//        addView(child, -1);
//    }
//
//    /**
//     * Adds a child view. If no layout parameters are already set on the child, the
//     * default parameters for this ViewGroup are set on the child.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     *
//     * @param child the child view to add
//     * @param index the position at which to add the child
//     *
//     * @see #generateDefaultLayoutParams()
//     */
//    public void addView(View child, int index) {
//        if (child == null) {
//            throw new IllegalArgumentException("Cannot add a null child view to a ViewGroup");
//        }
//        android.view.ViewGroup.LayoutParams params = child.getLayoutParams();
//        if (params == null) {
//            params = generateDefaultLayoutParams();
//            if (params == null) {
//                throw new IllegalArgumentException(
//                        "generateDefaultLayoutParams() cannot return null");
//            }
//        }
//        addView(child, index, params);
//    }
//
//    /**
//     * Adds a child view with this ViewGroup's default layout parameters and the
//     * specified width and height.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     *
//     * @param child the child view to add
//     */
//    public void addView(View child, int width, int height) {
//        final android.view.ViewGroup.LayoutParams params = generateDefaultLayoutParams();
//        params.width = width;
//        params.height = height;
//        addView(child, -1, params);
//    }
//
//    /**
//     * Adds a child view with the specified layout parameters.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     *
//     * @param child the child view to add
//     * @param params the layout parameters to set on the child
//     */
//    @Override
//    public void addView(View child, android.view.ViewGroup.LayoutParams params) {
//        addView(child, -1, params);
//    }
//
//    /**
//     * Adds a child view with the specified layout parameters.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     *
//     * @param child the child view to add
//     * @param index the position at which to add the child or -1 to add last
//     * @param params the layout parameters to set on the child
//     */
//    public void addView(View child, int index, android.view.ViewGroup.LayoutParams params) {
//        if (DBG) {
//            System.out.println(this + " addView");
//        }
//
//        if (child == null) {
//            throw new IllegalArgumentException("Cannot add a null child view to a ViewGroup");
//        }
//
//        // addViewInner() will call child.requestLayout() when setting the new LayoutParams
//        // therefore, we call requestLayout() on ourselves before, so that the child's request
//        // will be blocked at our level
//        requestLayout();
//        invalidate(true);
//        addViewInner(child, index, params, false);
//    }
//
//    @Override
//    public void updateViewLayout(View view, android.view.ViewGroup.LayoutParams params) {
//        if (!checkLayoutParams(params)) {
//            throw new IllegalArgumentException("Invalid LayoutParams supplied to " + this);
//        }
//        if (view.mParent != this) {
//            throw new IllegalArgumentException("Given view not a child of " + this);
//        }
//        view.setLayoutParams(params);
//    }
//
//    protected boolean checkLayoutParams(android.view.ViewGroup.LayoutParams p) {
//        return  p != null;
//    }
//
//    /**
//     * Interface definition for a callback to be invoked when the hierarchy
//     * within this view changed. The hierarchy changes whenever a child is added
//     * to or removed from this view.
//     */
//    public interface OnHierarchyChangeListener {
//        /**
//         * Called when a new child is added to a parent view.
//         *
//         * @param parent the view in which a child was added
//         * @param child the new child view added in the hierarchy
//         */
//        void onChildViewAdded(View parent, View child);
//
//        /**
//         * Called when a child is removed from a parent view.
//         *
//         * @param parent the view from which the child was removed
//         * @param child the child removed from the hierarchy
//         */
//        void onChildViewRemoved(View parent, View child);
//    }
//
//    /**
//     * Register a callback to be invoked when a child is added to or removed
//     * from this view.
//     *
//     * @param listener the callback to invoke on hierarchy change
//     */
//    public void setOnHierarchyChangeListener(android.view.ViewGroup.OnHierarchyChangeListener listener) {
//        mOnHierarchyChangeListener = listener;
//    }
//
//    @UnsupportedAppUsage
//    void dispatchViewAdded(View child) {
//        onViewAdded(child);
//        if (mOnHierarchyChangeListener != null) {
//            mOnHierarchyChangeListener.onChildViewAdded(this, child);
//        }
//    }
//
//    /**
//     * Called when a new child is added to this ViewGroup. Overrides should always
//     * call super.onViewAdded.
//     *
//     * @param child the added child view
//     */
//    public void onViewAdded(View child) {
//    }
//
//    @UnsupportedAppUsage
//    void dispatchViewRemoved(View child) {
//        onViewRemoved(child);
//        if (mOnHierarchyChangeListener != null) {
//            mOnHierarchyChangeListener.onChildViewRemoved(this, child);
//        }
//    }
//
//    /**
//     * Called when a child view is removed from this ViewGroup. Overrides should always
//     * call super.onViewRemoved.
//     *
//     * @param child the removed child view
//     */
//    public void onViewRemoved(View child) {
//    }
//
//    private void clearCachedLayoutMode() {
//        if (!hasBooleanFlag(FLAG_LAYOUT_MODE_WAS_EXPLICITLY_SET)) {
//            mLayoutMode = LAYOUT_MODE_UNDEFINED;
//        }
//    }
//
//    @Override
//    protected void onAttachedToWindow() {
//        super.onAttachedToWindow();
//        clearCachedLayoutMode();
//    }
//
//    @Override
//    protected void onDetachedFromWindow() {
//        super.onDetachedFromWindow();
//        clearCachedLayoutMode();
//    }
//
//    /** @hide */
//    @Override
//    protected void destroyHardwareResources() {
//        super.destroyHardwareResources();
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            getChildAt(i).destroyHardwareResources();
//        }
//    }
//
//    /**
//     * Adds a view during layout. This is useful if in your onLayout() method,
//     * you need to add more views (as does the list view for example).
//     *
//     * If index is negative, it means put it at the end of the list.
//     *
//     * @param child the view to add to the group
//     * @param index the index at which the child must be added or -1 to add last
//     * @param params the layout parameters to associate with the child
//     * @return true if the child was added, false otherwise
//     */
//    protected boolean addViewInLayout(View child, int index, android.view.ViewGroup.LayoutParams params) {
//        return addViewInLayout(child, index, params, false);
//    }
//
//    /**
//     * Adds a view during layout. This is useful if in your onLayout() method,
//     * you need to add more views (as does the list view for example).
//     *
//     * If index is negative, it means put it at the end of the list.
//     *
//     * @param child the view to add to the group
//     * @param index the index at which the child must be added or -1 to add last
//     * @param params the layout parameters to associate with the child
//     * @param preventRequestLayout if true, calling this method will not trigger a
//     *        layout request on child
//     * @return true if the child was added, false otherwise
//     */
//    protected boolean addViewInLayout(View child, int index, android.view.ViewGroup.LayoutParams params,
//                                      boolean preventRequestLayout) {
//        if (child == null) {
//            throw new IllegalArgumentException("Cannot add a null child view to a ViewGroup");
//        }
//        child.mParent = null;
//        addViewInner(child, index, params, preventRequestLayout);
//        child.mPrivateFlags = (child.mPrivateFlags & ~PFLAG_DIRTY_MASK) | PFLAG_DRAWN;
//        return true;
//    }
//
//    /**
//     * Prevents the specified child to be laid out during the next layout pass.
//     *
//     * @param child the child on which to perform the cleanup
//     */
//    protected void cleanupLayoutState(View child) {
//        child.mPrivateFlags &= ~View.PFLAG_FORCE_LAYOUT;
//    }
//
//    private void addViewInner(View child, int index, android.view.ViewGroup.LayoutParams params,
//                              boolean preventRequestLayout) {
//
//        if (mTransition != null) {
//            // Don't prevent other add transitions from completing, but cancel remove
//            // transitions to let them complete the process before we add to the container
//            mTransition.cancel(LayoutTransition.DISAPPEARING);
//        }
//
//        if (child.getParent() != null) {
//            throw new IllegalStateException("The specified child already has a parent. " +
//                    "You must call removeView() on the child's parent first.");
//        }
//
//        if (mTransition != null) {
//            mTransition.addChild(this, child);
//        }
//
//        if (!checkLayoutParams(params)) {
//            params = generateLayoutParams(params);
//        }
//
//        if (preventRequestLayout) {
//            child.mLayoutParams = params;
//        } else {
//            child.setLayoutParams(params);
//        }
//
//        if (index < 0) {
//            index = mChildrenCount;
//        }
//
//        addInArray(child, index);
//
//        // tell our children
//        if (preventRequestLayout) {
//            child.assignParent(this);
//        } else {
//            child.mParent = this;
//        }
//        if (child.hasUnhandledKeyListener()) {
//            incrementChildUnhandledKeyListeners();
//        }
//
//        final boolean childHasFocus = child.hasFocus();
//        if (childHasFocus) {
//            requestChildFocus(child, child.findFocus());
//        }
//
//        AttachInfo ai = mAttachInfo;
//        if (ai != null && (mGroupFlags & FLAG_PREVENT_DISPATCH_ATTACHED_TO_WINDOW) == 0) {
//            boolean lastKeepOn = ai.mKeepScreenOn;
//            ai.mKeepScreenOn = false;
//            child.dispatchAttachedToWindow(mAttachInfo, (mViewFlags&VISIBILITY_MASK));
//            if (ai.mKeepScreenOn) {
//                needGlobalAttributesUpdate(true);
//            }
//            ai.mKeepScreenOn = lastKeepOn;
//        }
//
//        if (child.isLayoutDirectionInherited()) {
//            child.resetRtlProperties();
//        }
//
//        dispatchViewAdded(child);
//
//        if ((child.mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE) {
//            mGroupFlags |= FLAG_NOTIFY_CHILDREN_ON_DRAWABLE_STATE_CHANGE;
//        }
//
//        if (child.hasTransientState()) {
//            childHasTransientStateChanged(child, true);
//        }
//
//        if (child.getVisibility() != View.GONE) {
//            notifySubtreeAccessibilityStateChangedIfNeeded();
//        }
//
//        if (mTransientIndices != null) {
//            final int transientCount = mTransientIndices.size();
//            for (int i = 0; i < transientCount; ++i) {
//                final int oldIndex = mTransientIndices.get(i);
//                if (index <= oldIndex) {
//                    mTransientIndices.set(i, oldIndex + 1);
//                }
//            }
//        }
//
//        if (mCurrentDragStartEvent != null && child.getVisibility() == VISIBLE) {
//            notifyChildOfDragStart(child);
//        }
//
//        if (child.hasDefaultFocus()) {
//            // When adding a child that contains default focus, either during inflation or while
//            // manually assembling the hierarchy, update the ancestor default-focus chain.
//            setDefaultFocus(child);
//        }
//
//        touchAccessibilityNodeProviderIfNeeded(child);
//    }
//
//    /**
//     * We may need to touch the provider to bring up the a11y layer. In a11y mode
//     * clients inspect the screen or the user touches it which triggers bringing up
//     * of the a11y infrastructure while in autofill mode we want the infra up and
//     * running from the beginning since we watch for a11y events to drive autofill.
//     */
//    private void touchAccessibilityNodeProviderIfNeeded(View child) {
//        if (mContext.isAutofillCompatibilityEnabled()) {
//            child.getAccessibilityNodeProvider();
//        }
//    }
//
//    private void addInArray(View child, int index) {
//        View[] children = mChildren;
//        final int count = mChildrenCount;
//        final int size = children.length;
//        if (index == count) {
//            if (size == count) {
//                mChildren = new View[size + ARRAY_CAPACITY_INCREMENT];
//                System.arraycopy(children, 0, mChildren, 0, size);
//                children = mChildren;
//            }
//            children[mChildrenCount++] = child;
//        } else if (index < count) {
//            if (size == count) {
//                mChildren = new View[size + ARRAY_CAPACITY_INCREMENT];
//                System.arraycopy(children, 0, mChildren, 0, index);
//                System.arraycopy(children, index, mChildren, index + 1, count - index);
//                children = mChildren;
//            } else {
//                System.arraycopy(children, index, children, index + 1, count - index);
//            }
//            children[index] = child;
//            mChildrenCount++;
//            if (mLastTouchDownIndex >= index) {
//                mLastTouchDownIndex++;
//            }
//        } else {
//            throw new IndexOutOfBoundsException("index=" + index + " count=" + count);
//        }
//    }
//
//    // This method also sets the child's mParent to null
//    private void removeFromArray(int index) {
//        final View[] children = mChildren;
//        if (!(mTransitioningViews != null && mTransitioningViews.contains(children[index]))) {
//            children[index].mParent = null;
//        }
//        final int count = mChildrenCount;
//        if (index == count - 1) {
//            children[--mChildrenCount] = null;
//        } else if (index >= 0 && index < count) {
//            System.arraycopy(children, index + 1, children, index, count - index - 1);
//            children[--mChildrenCount] = null;
//        } else {
//            throw new IndexOutOfBoundsException();
//        }
//        if (mLastTouchDownIndex == index) {
//            mLastTouchDownTime = 0;
//            mLastTouchDownIndex = -1;
//        } else if (mLastTouchDownIndex > index) {
//            mLastTouchDownIndex--;
//        }
//    }
//
//    // This method also sets the children's mParent to null
//    private void removeFromArray(int start, int count) {
//        final View[] children = mChildren;
//        final int childrenCount = mChildrenCount;
//
//        start = Math.max(0, start);
//        final int end = Math.min(childrenCount, start + count);
//
//        if (start == end) {
//            return;
//        }
//
//        if (end == childrenCount) {
//            for (int i = start; i < end; i++) {
//                children[i].mParent = null;
//                children[i] = null;
//            }
//        } else {
//            for (int i = start; i < end; i++) {
//                children[i].mParent = null;
//            }
//
//            // Since we're looping above, we might as well do the copy, but is arraycopy()
//            // faster than the extra 2 bounds checks we would do in the loop?
//            System.arraycopy(children, end, children, start, childrenCount - end);
//
//            for (int i = childrenCount - (end - start); i < childrenCount; i++) {
//                children[i] = null;
//            }
//        }
//
//        mChildrenCount -= (end - start);
//    }
//
//    private void bindLayoutAnimation(View child) {
//        Animation a = mLayoutAnimationController.getAnimationForView(child);
//        child.setAnimation(a);
//    }
//
//    /**
//     * Subclasses should override this method to set layout animation
//     * parameters on the supplied child.
//     *
//     * @param child the child to associate with animation parameters
//     * @param params the child's layout parameters which hold the animation
//     *        parameters
//     * @param index the index of the child in the view group
//     * @param count the number of children in the view group
//     */
//    protected void attachLayoutAnimationParameters(View child,
//                                                   android.view.ViewGroup.LayoutParams params, int index, int count) {
//        LayoutAnimationController.AnimationParameters animationParams =
//                params.layoutAnimationParameters;
//        if (animationParams == null) {
//            animationParams = new LayoutAnimationController.AnimationParameters();
//            params.layoutAnimationParameters = animationParams;
//        }
//
//        animationParams.count = count;
//        animationParams.index = index;
//    }
//
//    /**
//     * {@inheritDoc}
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     */
//    @Override
//    public void removeView(View view) {
//        if (removeViewInternal(view)) {
//            requestLayout();
//            invalidate(true);
//        }
//    }
//
//    /**
//     * Removes a view during layout. This is useful if in your onLayout() method,
//     * you need to remove more views.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     *
//     * @param view the view to remove from the group
//     */
//    public void removeViewInLayout(View view) {
//        removeViewInternal(view);
//    }
//
//    /**
//     * Removes a range of views during layout. This is useful if in your onLayout() method,
//     * you need to remove more views.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     *
//     * @param start the index of the first view to remove from the group
//     * @param count the number of views to remove from the group
//     */
//    public void removeViewsInLayout(int start, int count) {
//        removeViewsInternal(start, count);
//    }
//
//    /**
//     * Removes the view at the specified position in the group.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     *
//     * @param index the position in the group of the view to remove
//     */
//    public void removeViewAt(int index) {
//        removeViewInternal(index, getChildAt(index));
//        requestLayout();
//        invalidate(true);
//    }
//
//    /**
//     * Removes the specified range of views from the group.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     *
//     * @param start the first position in the group of the range of views to remove
//     * @param count the number of views to remove
//     */
//    public void removeViews(int start, int count) {
//        removeViewsInternal(start, count);
//        requestLayout();
//        invalidate(true);
//    }
//
//    private boolean removeViewInternal(View view) {
//        final int index = indexOfChild(view);
//        if (index >= 0) {
//            removeViewInternal(index, view);
//            return true;
//        }
//        return false;
//    }
//
//    private void removeViewInternal(int index, View view) {
//        if (mTransition != null) {
//            mTransition.removeChild(this, view);
//        }
//
//        boolean clearChildFocus = false;
//        if (view == mFocused) {
//            view.unFocus(null);
//            clearChildFocus = true;
//        }
//        if (view == mFocusedInCluster) {
//            clearFocusedInCluster(view);
//        }
//
//        view.clearAccessibilityFocus();
//
//        cancelTouchTarget(view);
//        cancelHoverTarget(view);
//
//        if (view.getAnimation() != null ||
//                (mTransitioningViews != null && mTransitioningViews.contains(view))) {
//            addDisappearingView(view);
//        } else if (view.mAttachInfo != null) {
//            view.dispatchDetachedFromWindow();
//        }
//
//        if (view.hasTransientState()) {
//            childHasTransientStateChanged(view, false);
//        }
//
//        needGlobalAttributesUpdate(false);
//
//        removeFromArray(index);
//
//        if (view.hasUnhandledKeyListener()) {
//            decrementChildUnhandledKeyListeners();
//        }
//
//        if (view == mDefaultFocus) {
//            clearDefaultFocus(view);
//        }
//        if (clearChildFocus) {
//            clearChildFocus(view);
//            if (!rootViewRequestFocus()) {
//                notifyGlobalFocusCleared(this);
//            }
//        }
//
//        dispatchViewRemoved(view);
//
//        if (view.getVisibility() != View.GONE) {
//            notifySubtreeAccessibilityStateChangedIfNeeded();
//        }
//
//        int transientCount = mTransientIndices == null ? 0 : mTransientIndices.size();
//        for (int i = 0; i < transientCount; ++i) {
//            final int oldIndex = mTransientIndices.get(i);
//            if (index < oldIndex) {
//                mTransientIndices.set(i, oldIndex - 1);
//            }
//        }
//
//        if (mCurrentDragStartEvent != null) {
//            mChildrenInterestedInDrag.remove(view);
//        }
//    }
//
//    /**
//     * Sets the LayoutTransition object for this ViewGroup. If the LayoutTransition object is
//     * not null, changes in layout which occur because of children being added to or removed from
//     * the ViewGroup will be animated according to the animations defined in that LayoutTransition
//     * object. By default, the transition object is null (so layout changes are not animated).
//     *
//     * <p>Replacing a non-null transition will cause that previous transition to be
//     * canceled, if it is currently running, to restore this container to
//     * its correct post-transition state.</p>
//     *
//     * @param transition The LayoutTransition object that will animated changes in layout. A value
//     * of <code>null</code> means no transition will run on layout changes.
//     * @attr ref android.R.styleable#ViewGroup_animateLayoutChanges
//     */
//    public void setLayoutTransition(LayoutTransition transition) {
//        if (mTransition != null) {
//            LayoutTransition previousTransition = mTransition;
//            previousTransition.cancel();
//            previousTransition.removeTransitionListener(mLayoutTransitionListener);
//        }
//        mTransition = transition;
//        if (mTransition != null) {
//            mTransition.addTransitionListener(mLayoutTransitionListener);
//        }
//    }
//
//    /**
//     * Gets the LayoutTransition object for this ViewGroup. If the LayoutTransition object is
//     * not null, changes in layout which occur because of children being added to or removed from
//     * the ViewGroup will be animated according to the animations defined in that LayoutTransition
//     * object. By default, the transition object is null (so layout changes are not animated).
//     *
//     * @return LayoutTranstion The LayoutTransition object that will animated changes in layout.
//     * A value of <code>null</code> means no transition will run on layout changes.
//     */
//    public LayoutTransition getLayoutTransition() {
//        return mTransition;
//    }
//
//    private void removeViewsInternal(int start, int count) {
//        final int end = start + count;
//
//        if (start < 0 || count < 0 || end > mChildrenCount) {
//            throw new IndexOutOfBoundsException();
//        }
//
//        final View focused = mFocused;
//        final boolean detach = mAttachInfo != null;
//        boolean clearChildFocus = false;
//        View clearDefaultFocus = null;
//
//        final View[] children = mChildren;
//
//        for (int i = start; i < end; i++) {
//            final View view = children[i];
//
//            if (mTransition != null) {
//                mTransition.removeChild(this, view);
//            }
//
//            if (view == focused) {
//                view.unFocus(null);
//                clearChildFocus = true;
//            }
//            if (view == mDefaultFocus) {
//                clearDefaultFocus = view;
//            }
//            if (view == mFocusedInCluster) {
//                clearFocusedInCluster(view);
//            }
//
//            view.clearAccessibilityFocus();
//
//            cancelTouchTarget(view);
//            cancelHoverTarget(view);
//
//            if (view.getAnimation() != null ||
//                    (mTransitioningViews != null && mTransitioningViews.contains(view))) {
//                addDisappearingView(view);
//            } else if (detach) {
//                view.dispatchDetachedFromWindow();
//            }
//
//            if (view.hasTransientState()) {
//                childHasTransientStateChanged(view, false);
//            }
//
//            needGlobalAttributesUpdate(false);
//
//            dispatchViewRemoved(view);
//        }
//
//        removeFromArray(start, count);
//
//        if (clearDefaultFocus != null) {
//            clearDefaultFocus(clearDefaultFocus);
//        }
//        if (clearChildFocus) {
//            clearChildFocus(focused);
//            if (!rootViewRequestFocus()) {
//                notifyGlobalFocusCleared(focused);
//            }
//        }
//    }
//
//    /**
//     * Call this method to remove all child views from the
//     * ViewGroup.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     */
//    public void removeAllViews() {
//        removeAllViewsInLayout();
//        requestLayout();
//        invalidate(true);
//    }
//
//    /**
//     * Called by a ViewGroup subclass to remove child views from itself,
//     * when it must first know its size on screen before it can calculate how many
//     * child views it will render. An example is a Gallery or a ListView, which
//     * may "have" 50 children, but actually only render the number of children
//     * that can currently fit inside the object on screen. Do not call
//     * this method unless you are extending ViewGroup and understand the
//     * view measuring and layout pipeline.
//     *
//     * <p><strong>Note:</strong> do not invoke this method from
//     * {@link #draw(Canvas)}, {@link #onDraw(Canvas)},
//     * {@link #dispatchDraw(Canvas)} or any related method.</p>
//     */
//    public void removeAllViewsInLayout() {
//        final int count = mChildrenCount;
//        if (count <= 0) {
//            return;
//        }
//
//        final View[] children = mChildren;
//        mChildrenCount = 0;
//
//        final View focused = mFocused;
//        final boolean detach = mAttachInfo != null;
//        boolean clearChildFocus = false;
//
//        needGlobalAttributesUpdate(false);
//
//        for (int i = count - 1; i >= 0; i--) {
//            final View view = children[i];
//
//            if (mTransition != null) {
//                mTransition.removeChild(this, view);
//            }
//
//            if (view == focused) {
//                view.unFocus(null);
//                clearChildFocus = true;
//            }
//
//            view.clearAccessibilityFocus();
//
//            cancelTouchTarget(view);
//            cancelHoverTarget(view);
//
//            if (view.getAnimation() != null ||
//                    (mTransitioningViews != null && mTransitioningViews.contains(view))) {
//                addDisappearingView(view);
//            } else if (detach) {
//                view.dispatchDetachedFromWindow();
//            }
//
//            if (view.hasTransientState()) {
//                childHasTransientStateChanged(view, false);
//            }
//
//            dispatchViewRemoved(view);
//
//            view.mParent = null;
//            children[i] = null;
//        }
//
//        if (mDefaultFocus != null) {
//            clearDefaultFocus(mDefaultFocus);
//        }
//        if (mFocusedInCluster != null) {
//            clearFocusedInCluster(mFocusedInCluster);
//        }
//        if (clearChildFocus) {
//            clearChildFocus(focused);
//            if (!rootViewRequestFocus()) {
//                notifyGlobalFocusCleared(focused);
//            }
//        }
//    }
//
//    /**
//     * Finishes the removal of a detached view. This method will dispatch the detached from
//     * window event and notify the hierarchy change listener.
//     * <p>
//     * This method is intended to be lightweight and makes no assumptions about whether the
//     * parent or child should be redrawn. Proper use of this method will include also making
//     * any appropriate {@link #requestLayout()} or {@link #invalidate()} calls.
//     * For example, callers can {@link #post(Runnable) post} a {@link Runnable}
//     * which performs a {@link #requestLayout()} on the next frame, after all detach/remove
//     * calls are finished, causing layout to be run prior to redrawing the view hierarchy.
//     *
//     * @param child the child to be definitely removed from the view hierarchy
//     * @param animate if true and the view has an animation, the view is placed in the
//     *                disappearing views list, otherwise, it is detached from the window
//     *
//     * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)
//     * @see #detachAllViewsFromParent()
//     * @see #detachViewFromParent(View)
//     * @see #detachViewFromParent(int)
//     */
//    protected void removeDetachedView(View child, boolean animate) {
//        if (mTransition != null) {
//            mTransition.removeChild(this, child);
//        }
//
//        if (child == mFocused) {
//            child.clearFocus();
//        }
//        if (child == mDefaultFocus) {
//            clearDefaultFocus(child);
//        }
//        if (child == mFocusedInCluster) {
//            clearFocusedInCluster(child);
//        }
//
//        child.clearAccessibilityFocus();
//
//        cancelTouchTarget(child);
//        cancelHoverTarget(child);
//
//        if ((animate && child.getAnimation() != null) ||
//                (mTransitioningViews != null && mTransitioningViews.contains(child))) {
//            addDisappearingView(child);
//        } else if (child.mAttachInfo != null) {
//            child.dispatchDetachedFromWindow();
//        }
//
//        if (child.hasTransientState()) {
//            childHasTransientStateChanged(child, false);
//        }
//
//        dispatchViewRemoved(child);
//    }
//
//    /**
//     * Attaches a view to this view group. Attaching a view assigns this group as the parent,
//     * sets the layout parameters and puts the view in the list of children so that
//     * it can be retrieved by calling {@link #getChildAt(int)}.
//     * <p>
//     * This method is intended to be lightweight and makes no assumptions about whether the
//     * parent or child should be redrawn. Proper use of this method will include also making
//     * any appropriate {@link #requestLayout()} or {@link #invalidate()} calls.
//     * For example, callers can {@link #post(Runnable) post} a {@link Runnable}
//     * which performs a {@link #requestLayout()} on the next frame, after all detach/attach
//     * calls are finished, causing layout to be run prior to redrawing the view hierarchy.
//     * <p>
//     * This method should be called only for views which were detached from their parent.
//     *
//     * @param child the child to attach
//     * @param index the index at which the child should be attached
//     * @param params the layout parameters of the child
//     *
//     * @see #removeDetachedView(View, boolean)
//     * @see #detachAllViewsFromParent()
//     * @see #detachViewFromParent(View)
//     * @see #detachViewFromParent(int)
//     */
//    protected void attachViewToParent(View child, int index, android.view.ViewGroup.LayoutParams params) {
//        child.mLayoutParams = params;
//
//        if (index < 0) {
//            index = mChildrenCount;
//        }
//
//        addInArray(child, index);
//
//        child.mParent = this;
//        child.mPrivateFlags = (child.mPrivateFlags & ~PFLAG_DIRTY_MASK
//                & ~PFLAG_DRAWING_CACHE_VALID)
//                | PFLAG_DRAWN | PFLAG_INVALIDATED;
//        this.mPrivateFlags |= PFLAG_INVALIDATED;
//
//        if (child.hasFocus()) {
//            requestChildFocus(child, child.findFocus());
//        }
//        dispatchVisibilityAggregated(isAttachedToWindow() && getWindowVisibility() == VISIBLE
//                && isShown());
//        notifySubtreeAccessibilityStateChangedIfNeeded();
//    }
//
//    /**
//     * Detaches a view from its parent. Detaching a view should be followed
//     * either by a call to
//     * {@link #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)}
//     * or a call to {@link #removeDetachedView(View, boolean)}. Detachment should only be
//     * temporary; reattachment or removal should happen within the same drawing cycle as
//     * detachment. When a view is detached, its parent is null and cannot be retrieved by a
//     * call to {@link #getChildAt(int)}.
//     *
//     * @param child the child to detach
//     *
//     * @see #detachViewFromParent(int)
//     * @see #detachViewsFromParent(int, int)
//     * @see #detachAllViewsFromParent()
//     * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)
//     * @see #removeDetachedView(View, boolean)
//     */
//    protected void detachViewFromParent(View child) {
//        removeFromArray(indexOfChild(child));
//    }
//
//    /**
//     * Detaches a view from its parent. Detaching a view should be followed
//     * either by a call to
//     * {@link #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)}
//     * or a call to {@link #removeDetachedView(View, boolean)}. Detachment should only be
//     * temporary; reattachment or removal should happen within the same drawing cycle as
//     * detachment. When a view is detached, its parent is null and cannot be retrieved by a
//     * call to {@link #getChildAt(int)}.
//     *
//     * @param index the index of the child to detach
//     *
//     * @see #detachViewFromParent(View)
//     * @see #detachAllViewsFromParent()
//     * @see #detachViewsFromParent(int, int)
//     * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)
//     * @see #removeDetachedView(View, boolean)
//     */
//    protected void detachViewFromParent(int index) {
//        removeFromArray(index);
//    }
//
//    /**
//     * Detaches a range of views from their parents. Detaching a view should be followed
//     * either by a call to
//     * {@link #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)}
//     * or a call to {@link #removeDetachedView(View, boolean)}. Detachment should only be
//     * temporary; reattachment or removal should happen within the same drawing cycle as
//     * detachment. When a view is detached, its parent is null and cannot be retrieved by a
//     * call to {@link #getChildAt(int)}.
//     *
//     * @param start the first index of the childrend range to detach
//     * @param count the number of children to detach
//     *
//     * @see #detachViewFromParent(View)
//     * @see #detachViewFromParent(int)
//     * @see #detachAllViewsFromParent()
//     * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)
//     * @see #removeDetachedView(View, boolean)
//     */
//    protected void detachViewsFromParent(int start, int count) {
//        removeFromArray(start, count);
//    }
//
//    /**
//     * Detaches all views from the parent. Detaching a view should be followed
//     * either by a call to
//     * {@link #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)}
//     * or a call to {@link #removeDetachedView(View, boolean)}. Detachment should only be
//     * temporary; reattachment or removal should happen within the same drawing cycle as
//     * detachment. When a view is detached, its parent is null and cannot be retrieved by a
//     * call to {@link #getChildAt(int)}.
//     *
//     * @see #detachViewFromParent(View)
//     * @see #detachViewFromParent(int)
//     * @see #detachViewsFromParent(int, int)
//     * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)
//     * @see #removeDetachedView(View, boolean)
//     */
//    protected void detachAllViewsFromParent() {
//        final int count = mChildrenCount;
//        if (count <= 0) {
//            return;
//        }
//
//        final View[] children = mChildren;
//        mChildrenCount = 0;
//
//        for (int i = count - 1; i >= 0; i--) {
//            children[i].mParent = null;
//            children[i] = null;
//        }
//    }
//
//    @Override
//    @CallSuper
//    public void onDescendantInvalidated(@NonNull View child, @NonNull View target) {
//        /*
//         * HW-only, Rect-ignoring damage codepath
//         *
//         * We don't deal with rectangles here, since RenderThread native code computes damage for
//         * everything drawn by HWUI (and SW layer / drawing cache doesn't keep track of damage area)
//         */
//
//        // if set, combine the animation flag into the parent
//        mPrivateFlags |= (target.mPrivateFlags & PFLAG_DRAW_ANIMATION);
//
//        if ((target.mPrivateFlags & ~PFLAG_DIRTY_MASK) != 0) {
//            // We lazily use PFLAG_DIRTY, since computing opaque isn't worth the potential
//            // optimization in provides in a DisplayList world.
//            mPrivateFlags = (mPrivateFlags & ~PFLAG_DIRTY_MASK) | PFLAG_DIRTY;
//
//            // simplified invalidateChildInParent behavior: clear cache validity to be safe...
//            mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID;
//        }
//
//        // ... and mark inval if in software layer that needs to repaint (hw handled in native)
//        if (mLayerType == LAYER_TYPE_SOFTWARE) {
//            // Layered parents should be invalidated. Escalate to a full invalidate (and note that
//            // we do this after consuming any relevant flags from the originating descendant)
//            mPrivateFlags |= PFLAG_INVALIDATED | PFLAG_DIRTY;
//            target = this;
//        }
//
//        if (mParent != null) {
//            mParent.onDescendantInvalidated(this, target);
//        }
//    }
//
//
//    /**
//     * Don't call or override this method. It is used for the implementation of
//     * the view hierarchy.
//     *
//     * @deprecated Use {@link #onDescendantInvalidated(View, View)} instead to observe updates to
//     * draw state in descendants.
//     */
//    @Deprecated
//    @Override
//    public final void invalidateChild(View child, final Rect dirty) {
//        final AttachInfo attachInfo = mAttachInfo;
//        if (attachInfo != null && attachInfo.mHardwareAccelerated) {
//            // HW accelerated fast path
//            onDescendantInvalidated(child, child);
//            return;
//        }
//
//        ViewParent parent = this;
//        if (attachInfo != null) {
//            // If the child is drawing an animation, we want to copy this flag onto
//            // ourselves and the parent to make sure the invalidate request goes
//            // through
//            final boolean drawAnimation = (child.mPrivateFlags & PFLAG_DRAW_ANIMATION) != 0;
//
//            // Check whether the child that requests the invalidate is fully opaque
//            // Views being animated or transformed are not considered opaque because we may
//            // be invalidating their old position and need the parent to paint behind them.
//            Matrix childMatrix = child.getMatrix();
//            // Mark the child as dirty, using the appropriate flag
//            // Make sure we do not set both flags at the same time
//
//            if (child.mLayerType != LAYER_TYPE_NONE) {
//                mPrivateFlags |= PFLAG_INVALIDATED;
//                mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID;
//            }
//
//            final int[] location = attachInfo.mInvalidateChildLocation;
//            location[CHILD_LEFT_INDEX] = child.mLeft;
//            location[CHILD_TOP_INDEX] = child.mTop;
//            if (!childMatrix.isIdentity() ||
//                    (mGroupFlags & android.view.ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) {
//                RectF boundingRect = attachInfo.mTmpTransformRect;
//                boundingRect.set(dirty);
//                Matrix transformMatrix;
//                if ((mGroupFlags & android.view.ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) {
//                    Transformation t = attachInfo.mTmpTransformation;
//                    boolean transformed = getChildStaticTransformation(child, t);
//                    if (transformed) {
//                        transformMatrix = attachInfo.mTmpMatrix;
//                        transformMatrix.set(t.getMatrix());
//                        if (!childMatrix.isIdentity()) {
//                            transformMatrix.preConcat(childMatrix);
//                        }
//                    } else {
//                        transformMatrix = childMatrix;
//                    }
//                } else {
//                    transformMatrix = childMatrix;
//                }
//                transformMatrix.mapRect(boundingRect);
//                dirty.set((int) Math.floor(boundingRect.left),
//                        (int) Math.floor(boundingRect.top),
//                        (int) Math.ceil(boundingRect.right),
//                        (int) Math.ceil(boundingRect.bottom));
//            }
//
//            do {
//                View view = null;
//                if (parent instanceof View) {
//                    view = (View) parent;
//                }
//
//                if (drawAnimation) {
//                    if (view != null) {
//                        view.mPrivateFlags |= PFLAG_DRAW_ANIMATION;
//                    } else if (parent instanceof ViewRootImpl) {
//                        ((ViewRootImpl) parent).mIsAnimating = true;
//                    }
//                }
//
//                // If the parent is dirty opaque or not dirty, mark it dirty with the opaque
//                // flag coming from the child that initiated the invalidate
//                if (view != null) {
//                    if ((view.mPrivateFlags & PFLAG_DIRTY_MASK) != PFLAG_DIRTY) {
//                        view.mPrivateFlags = (view.mPrivateFlags & ~PFLAG_DIRTY_MASK) | PFLAG_DIRTY;
//                    }
//                }
//
//                parent = parent.invalidateChildInParent(location, dirty);
//                if (view != null) {
//                    // Account for transform on current parent
//                    Matrix m = view.getMatrix();
//                    if (!m.isIdentity()) {
//                        RectF boundingRect = attachInfo.mTmpTransformRect;
//                        boundingRect.set(dirty);
//                        m.mapRect(boundingRect);
//                        dirty.set((int) Math.floor(boundingRect.left),
//                                (int) Math.floor(boundingRect.top),
//                                (int) Math.ceil(boundingRect.right),
//                                (int) Math.ceil(boundingRect.bottom));
//                    }
//                }
//            } while (parent != null);
//        }
//    }
//
//    /**
//     * Don't call or override this method. It is used for the implementation of
//     * the view hierarchy.
//     *
//     * This implementation returns null if this ViewGroup does not have a parent,
//     * if this ViewGroup is already fully invalidated or if the dirty rectangle
//     * does not intersect with this ViewGroup's bounds.
//     *
//     * @deprecated Use {@link #onDescendantInvalidated(View, View)} instead to observe updates to
//     * draw state in descendants.
//     */
//    @Deprecated
//    @Override
//    public ViewParent invalidateChildInParent(final int[] location, final Rect dirty) {
//        if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID)) != 0) {
//            // either DRAWN, or DRAWING_CACHE_VALID
//            if ((mGroupFlags & (FLAG_OPTIMIZE_INVALIDATE | FLAG_ANIMATION_DONE))
//                    != FLAG_OPTIMIZE_INVALIDATE) {
//                dirty.offset(location[CHILD_LEFT_INDEX] - mScrollX,
//                        location[CHILD_TOP_INDEX] - mScrollY);
//                if ((mGroupFlags & FLAG_CLIP_CHILDREN) == 0) {
//                    dirty.union(0, 0, mRight - mLeft, mBottom - mTop);
//                }
//
//                final int left = mLeft;
//                final int top = mTop;
//
//                if ((mGroupFlags & FLAG_CLIP_CHILDREN) == FLAG_CLIP_CHILDREN) {
//                    if (!dirty.intersect(0, 0, mRight - left, mBottom - top)) {
//                        dirty.setEmpty();
//                    }
//                }
//
//                location[CHILD_LEFT_INDEX] = left;
//                location[CHILD_TOP_INDEX] = top;
//            } else {
//
//                if ((mGroupFlags & FLAG_CLIP_CHILDREN) == FLAG_CLIP_CHILDREN) {
//                    dirty.set(0, 0, mRight - mLeft, mBottom - mTop);
//                } else {
//                    // in case the dirty rect extends outside the bounds of this container
//                    dirty.union(0, 0, mRight - mLeft, mBottom - mTop);
//                }
//                location[CHILD_LEFT_INDEX] = mLeft;
//                location[CHILD_TOP_INDEX] = mTop;
//
//                mPrivateFlags &= ~PFLAG_DRAWN;
//            }
//            mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID;
//            if (mLayerType != LAYER_TYPE_NONE) {
//                mPrivateFlags |= PFLAG_INVALIDATED;
//            }
//
//            return mParent;
//        }
//
//        return null;
//    }
//
//    /**
//     * Offset a rectangle that is in a descendant's coordinate
//     * space into our coordinate space.
//     * @param descendant A descendant of this view
//     * @param rect A rectangle defined in descendant's coordinate space.
//     */
//    public final void offsetDescendantRectToMyCoords(View descendant, Rect rect) {
//        offsetRectBetweenParentAndChild(descendant, rect, true, false);
//    }
//
//    /**
//     * Offset a rectangle that is in our coordinate space into an ancestor's
//     * coordinate space.
//     * @param descendant A descendant of this view
//     * @param rect A rectangle defined in descendant's coordinate space.
//     */
//    public final void offsetRectIntoDescendantCoords(View descendant, Rect rect) {
//        offsetRectBetweenParentAndChild(descendant, rect, false, false);
//    }
//
//    /**
//     * Helper method that offsets a rect either from parent to descendant or
//     * descendant to parent.
//     */
//    void offsetRectBetweenParentAndChild(View descendant, Rect rect,
//                                         boolean offsetFromChildToParent, boolean clipToBounds) {
//
//        // already in the same coord system :)
//        if (descendant == this) {
//            return;
//        }
//
//        ViewParent theParent = descendant.mParent;
//
//        // search and offset up to the parent
//        while ((theParent != null)
//                && (theParent instanceof View)
//                && (theParent != this)) {
//
//            if (offsetFromChildToParent) {
//                rect.offset(descendant.mLeft - descendant.mScrollX,
//                        descendant.mTop - descendant.mScrollY);
//                if (clipToBounds) {
//                    View p = (View) theParent;
//                    boolean intersected = rect.intersect(0, 0, p.mRight - p.mLeft,
//                            p.mBottom - p.mTop);
//                    if (!intersected) {
//                        rect.setEmpty();
//                    }
//                }
//            } else {
//                if (clipToBounds) {
//                    View p = (View) theParent;
//                    boolean intersected = rect.intersect(0, 0, p.mRight - p.mLeft,
//                            p.mBottom - p.mTop);
//                    if (!intersected) {
//                        rect.setEmpty();
//                    }
//                }
//                rect.offset(descendant.mScrollX - descendant.mLeft,
//                        descendant.mScrollY - descendant.mTop);
//            }
//
//            descendant = (View) theParent;
//            theParent = descendant.mParent;
//        }
//
//        // now that we are up to this view, need to offset one more time
//        // to get into our coordinate space
//        if (theParent == this) {
//            if (offsetFromChildToParent) {
//                rect.offset(descendant.mLeft - descendant.mScrollX,
//                        descendant.mTop - descendant.mScrollY);
//            } else {
//                rect.offset(descendant.mScrollX - descendant.mLeft,
//                        descendant.mScrollY - descendant.mTop);
//            }
//        } else {
//            throw new IllegalArgumentException("parameter must be a descendant of this view");
//        }
//    }
//
//    /**
//     * Offset the vertical location of all children of this view by the specified number of pixels.
//     *
//     * @param offset the number of pixels to offset
//     *
//     * @hide
//     */
//    @UnsupportedAppUsage
//    public void offsetChildrenTopAndBottom(int offset) {
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        boolean invalidate = false;
//
//        for (int i = 0; i < count; i++) {
//            final View v = children[i];
//            v.mTop += offset;
//            v.mBottom += offset;
//            if (v.mRenderNode != null) {
//                invalidate = true;
//                v.mRenderNode.offsetTopAndBottom(offset);
//            }
//        }
//
//        if (invalidate) {
//            invalidateViewProperty(false, false);
//        }
//        notifySubtreeAccessibilityStateChangedIfNeeded();
//    }
//
//    @Override
//    public boolean getChildVisibleRect(View child, Rect r, Point offset) {
//        return getChildVisibleRect(child, r, offset, false);
//    }
//
//    /**
//     * @param forceParentCheck true to guarantee that this call will propagate to all ancestors,
//     *      false otherwise
//     *
//     * @hide
//     */
//    public boolean getChildVisibleRect(
//            View child, Rect r, Point offset, boolean forceParentCheck) {
//        // It doesn't make a whole lot of sense to call this on a view that isn't attached,
//        // but for some simple tests it can be useful. If we don't have attach info this
//        // will allocate memory.
//        final RectF rect = mAttachInfo != null ? mAttachInfo.mTmpTransformRect : new RectF();
//        rect.set(r);
//
//        if (!child.hasIdentityMatrix()) {
//            child.getMatrix().mapRect(rect);
//        }
//
//        final int dx = child.mLeft - mScrollX;
//        final int dy = child.mTop - mScrollY;
//
//        rect.offset(dx, dy);
//
//        if (offset != null) {
//            if (!child.hasIdentityMatrix()) {
//                float[] position = mAttachInfo != null ? mAttachInfo.mTmpTransformLocation
//                        : new float[2];
//                position[0] = offset.x;
//                position[1] = offset.y;
//                child.getMatrix().mapPoints(position);
//                offset.x = Math.round(position[0]);
//                offset.y = Math.round(position[1]);
//            }
//            offset.x += dx;
//            offset.y += dy;
//        }
//
//        final int width = mRight - mLeft;
//        final int height = mBottom - mTop;
//
//        boolean rectIsVisible = true;
//        if (mParent == null ||
//                (mParent instanceof android.view.ViewGroup && ((android.view.ViewGroup) mParent).getClipChildren())) {
//            // Clip to bounds.
//            rectIsVisible = rect.intersect(0, 0, width, height);
//        }
//
//        if ((forceParentCheck || rectIsVisible)
//                && (mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK) {
//            // Clip to padding.
//            rectIsVisible = rect.intersect(mPaddingLeft, mPaddingTop,
//                    width - mPaddingRight, height - mPaddingBottom);
//        }
//
//        if ((forceParentCheck || rectIsVisible) && mClipBounds != null) {
//            // Clip to clipBounds.
//            rectIsVisible = rect.intersect(mClipBounds.left, mClipBounds.top, mClipBounds.right,
//                    mClipBounds.bottom);
//        }
//        r.set((int) Math.floor(rect.left), (int) Math.floor(rect.top),
//                (int) Math.ceil(rect.right), (int) Math.ceil(rect.bottom));
//
//        if ((forceParentCheck || rectIsVisible) && mParent != null) {
//            if (mParent instanceof android.view.ViewGroup) {
//                rectIsVisible = ((android.view.ViewGroup) mParent)
//                        .getChildVisibleRect(this, r, offset, forceParentCheck);
//            } else {
//                rectIsVisible = mParent.getChildVisibleRect(this, r, offset);
//            }
//        }
//        return rectIsVisible;
//    }
//
//    @Override
//    public final void layout(int l, int t, int r, int b) {
//        if (!mSuppressLayout && (mTransition == null || !mTransition.isChangingLayout())) {
//            if (mTransition != null) {
//                mTransition.layoutChange(this);
//            }
//            super.layout(l, t, r, b);
//        } else {
//            // record the fact that we noop'd it; request layout when transition finishes
//            mLayoutCalledWhileSuppressed = true;
//        }
//    }
//
//    @Override
//    protected abstract void onLayout(boolean changed,
//                                     int l, int t, int r, int b);
//
//    /**
//     * Indicates whether the view group has the ability to animate its children
//     * after the first layout.
//     *
//     * @return true if the children can be animated, false otherwise
//     */
//    protected boolean canAnimate() {
//        return mLayoutAnimationController != null;
//    }
//
//    /**
//     * Runs the layout animation. Calling this method triggers a relayout of
//     * this view group.
//     */
//    public void startLayoutAnimation() {
//        if (mLayoutAnimationController != null) {
//            mGroupFlags |= FLAG_RUN_ANIMATION;
//            requestLayout();
//        }
//    }
//
//    /**
//     * Schedules the layout animation to be played after the next layout pass
//     * of this view group. This can be used to restart the layout animation
//     * when the content of the view group changes or when the activity is
//     * paused and resumed.
//     */
//    public void scheduleLayoutAnimation() {
//        mGroupFlags |= FLAG_RUN_ANIMATION;
//    }
//
//    /**
//     * Sets the layout animation controller used to animate the group's
//     * children after the first layout.
//     *
//     * @param controller the animation controller
//     */
//    public void setLayoutAnimation(LayoutAnimationController controller) {
//        mLayoutAnimationController = controller;
//        if (mLayoutAnimationController != null) {
//            mGroupFlags |= FLAG_RUN_ANIMATION;
//        }
//    }
//
//    /**
//     * Returns the layout animation controller used to animate the group's
//     * children.
//     *
//     * @return the current animation controller
//     */
//    @InspectableProperty
//    public LayoutAnimationController getLayoutAnimation() {
//        return mLayoutAnimationController;
//    }
//
//    /**
//     * Indicates whether the children's drawing cache is used during a layout
//     * animation. By default, the drawing cache is enabled but this will prevent
//     * nested layout animations from working. To nest animations, you must disable
//     * the cache.
//     *
//     * @return true if the animation cache is enabled, false otherwise
//     *
//     * @see #setAnimationCacheEnabled(boolean)
//     * @see View#setDrawingCacheEnabled(boolean)
//     *
//     * @deprecated As of {@link Build.VERSION_CODES#M}, this property is ignored.
//     * Caching behavior of children may be controlled through {@link View#setLayerType(int, Paint)}.
//     */
//    @Deprecated
//    @InspectableProperty(name = "animationCache")
//    public boolean isAnimationCacheEnabled() {
//        return (mGroupFlags & FLAG_ANIMATION_CACHE) == FLAG_ANIMATION_CACHE;
//    }
//
//    /**
//     * Enables or disables the children's drawing cache during a layout animation.
//     * By default, the drawing cache is enabled but this will prevent nested
//     * layout animations from working. To nest animations, you must disable the
//     * cache.
//     *
//     * @param enabled true to enable the animation cache, false otherwise
//     *
//     * @see #isAnimationCacheEnabled()
//     * @see View#setDrawingCacheEnabled(boolean)
//     *
//     * @deprecated As of {@link Build.VERSION_CODES#M}, this property is ignored.
//     * Caching behavior of children may be controlled through {@link View#setLayerType(int, Paint)}.
//     */
//    @Deprecated
//    public void setAnimationCacheEnabled(boolean enabled) {
//        setBooleanFlag(FLAG_ANIMATION_CACHE, enabled);
//    }
//
//    /**
//     * Indicates whether this ViewGroup will always try to draw its children using their
//     * drawing cache. By default this property is enabled.
//     *
//     * @return true if the animation cache is enabled, false otherwise
//     *
//     * @see #setAlwaysDrawnWithCacheEnabled(boolean)
//     * @see #setChildrenDrawnWithCacheEnabled(boolean)
//     * @see View#setDrawingCacheEnabled(boolean)
//     *
//     * @deprecated As of {@link Build.VERSION_CODES#M}, this property is ignored.
//     * Child views may no longer have their caching behavior disabled by parents.
//     */
//    @Deprecated
//    @InspectableProperty(name = "alwaysDrawnWithCache")
//    public boolean isAlwaysDrawnWithCacheEnabled() {
//        return (mGroupFlags & FLAG_ALWAYS_DRAWN_WITH_CACHE) == FLAG_ALWAYS_DRAWN_WITH_CACHE;
//    }
//
//    /**
//     * Indicates whether this ViewGroup will always try to draw its children using their
//     * drawing cache. This property can be set to true when the cache rendering is
//     * slightly different from the children's normal rendering. Renderings can be different,
//     * for instance, when the cache's quality is set to low.
//     *
//     * When this property is disabled, the ViewGroup will use the drawing cache of its
//     * children only when asked to. It's usually the task of subclasses to tell ViewGroup
//     * when to start using the drawing cache and when to stop using it.
//     *
//     * @param always true to always draw with the drawing cache, false otherwise
//     *
//     * @see #isAlwaysDrawnWithCacheEnabled()
//     * @see #setChildrenDrawnWithCacheEnabled(boolean)
//     * @see View#setDrawingCacheEnabled(boolean)
//     * @see View#setDrawingCacheQuality(int)
//     *
//     * @deprecated As of {@link Build.VERSION_CODES#M}, this property is ignored.
//     * Child views may no longer have their caching behavior disabled by parents.
//     */
//    @Deprecated
//    public void setAlwaysDrawnWithCacheEnabled(boolean always) {
//        setBooleanFlag(FLAG_ALWAYS_DRAWN_WITH_CACHE, always);
//    }
//
//    /**
//     * Indicates whether the ViewGroup is currently drawing its children using
//     * their drawing cache.
//     *
//     * @return true if children should be drawn with their cache, false otherwise
//     *
//     * @see #setAlwaysDrawnWithCacheEnabled(boolean)
//     * @see #setChildrenDrawnWithCacheEnabled(boolean)
//     *
//     * @deprecated As of {@link Build.VERSION_CODES#M}, this property is ignored.
//     * Child views may no longer be forced to cache their rendering state by their parents.
//     * Use {@link View#setLayerType(int, Paint)} on individual Views instead.
//     */
//    @Deprecated
//    protected boolean isChildrenDrawnWithCacheEnabled() {
//        return (mGroupFlags & FLAG_CHILDREN_DRAWN_WITH_CACHE) == FLAG_CHILDREN_DRAWN_WITH_CACHE;
//    }
//
//    /**
//     * Tells the ViewGroup to draw its children using their drawing cache. This property
//     * is ignored when {@link #isAlwaysDrawnWithCacheEnabled()} is true. A child's drawing cache
//     * will be used only if it has been enabled.
//     *
//     * Subclasses should call this method to start and stop using the drawing cache when
//     * they perform performance sensitive operations, like scrolling or animating.
//     *
//     * @param enabled true if children should be drawn with their cache, false otherwise
//     *
//     * @see #setAlwaysDrawnWithCacheEnabled(boolean)
//     * @see #isChildrenDrawnWithCacheEnabled()
//     *
//     * @deprecated As of {@link Build.VERSION_CODES#M}, this property is ignored.
//     * Child views may no longer be forced to cache their rendering state by their parents.
//     * Use {@link View#setLayerType(int, Paint)} on individual Views instead.
//     */
//    @Deprecated
//    protected void setChildrenDrawnWithCacheEnabled(boolean enabled) {
//        setBooleanFlag(FLAG_CHILDREN_DRAWN_WITH_CACHE, enabled);
//    }
//
//    /**
//     * Indicates whether the ViewGroup is drawing its children in the order defined by
//     * {@link #getChildDrawingOrder(int, int)}.
//     *
//     * @return true if children drawing order is defined by {@link #getChildDrawingOrder(int, int)},
//     *         false otherwise
//     *
//     * @see #setChildrenDrawingOrderEnabled(boolean)
//     * @see #getChildDrawingOrder(int, int)
//     */
//    @ViewDebug.ExportedProperty(category = "drawing")
//    protected boolean isChildrenDrawingOrderEnabled() {
//        return (mGroupFlags & FLAG_USE_CHILD_DRAWING_ORDER) == FLAG_USE_CHILD_DRAWING_ORDER;
//    }
//
//    /**
//     * Tells the ViewGroup whether to draw its children in the order defined by the method
//     * {@link #getChildDrawingOrder(int, int)}.
//     * <p>
//     * Note that {@link View#getZ() Z} reordering, done by {@link #dispatchDraw(Canvas)},
//     * will override custom child ordering done via this method.
//     *
//     * @param enabled true if the order of the children when drawing is determined by
//     *        {@link #getChildDrawingOrder(int, int)}, false otherwise
//     *
//     * @see #isChildrenDrawingOrderEnabled()
//     * @see #getChildDrawingOrder(int, int)
//     */
//    protected void setChildrenDrawingOrderEnabled(boolean enabled) {
//        setBooleanFlag(FLAG_USE_CHILD_DRAWING_ORDER, enabled);
//    }
//
//    private boolean hasBooleanFlag(int flag) {
//        return (mGroupFlags & flag) == flag;
//    }
//
//    private void setBooleanFlag(int flag, boolean value) {
//        if (value) {
//            mGroupFlags |= flag;
//        } else {
//            mGroupFlags &= ~flag;
//        }
//    }
//
//    /**
//     * Returns an integer indicating what types of drawing caches are kept in memory.
//     *
//     * @see #setPersistentDrawingCache(int)
//     * @see #setAnimationCacheEnabled(boolean)
//     *
//     * @return one or a combination of {@link #PERSISTENT_NO_CACHE},
//     *         {@link #PERSISTENT_ANIMATION_CACHE}, {@link #PERSISTENT_SCROLLING_CACHE}
//     *         and {@link #PERSISTENT_ALL_CACHES}
//     *
//     * @deprecated The view drawing cache was largely made obsolete with the introduction of
//     * hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
//     * layers are largely unnecessary and can easily result in a net loss in performance due to the
//     * cost of creating and updating the layer. In the rare cases where caching layers are useful,
//     * such as for alpha animations, {@link #setLayerType(int, Paint)} handles this with hardware
//     * rendering. For software-rendered snapshots of a small part of the View hierarchy or
//     * individual Views it is recommended to create a {@link Canvas} from either a {@link Bitmap} or
//     * {@link android.graphics.Picture} and call {@link #draw(Canvas)} on the View. However these
//     * software-rendered usages are discouraged and have compatibility issues with hardware-only
//     * rendering features such as {@link Bitmap.Config#HARDWARE Config.HARDWARE}
//     * bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
//     * reports or unit testing the {@link PixelCopy} API is recommended.
//     */
//    @Deprecated
//    @ViewDebug.ExportedProperty(category = "drawing", mapping = {
//            @ViewDebug.IntToString(from = PERSISTENT_NO_CACHE,        to = "NONE"),
//            @ViewDebug.IntToString(from = PERSISTENT_ANIMATION_CACHE, to = "ANIMATION"),
//            @ViewDebug.IntToString(from = PERSISTENT_SCROLLING_CACHE, to = "SCROLLING"),
//            @ViewDebug.IntToString(from = PERSISTENT_ALL_CACHES,      to = "ALL")
//    })
//    @InspectableProperty(enumMapping = {
//            @EnumEntry(value = PERSISTENT_NO_CACHE, name = "none"),
//            @EnumEntry(value = PERSISTENT_ANIMATION_CACHE, name = "animation"),
//            @EnumEntry(value = PERSISTENT_SCROLLING_CACHE, name = "scrolling"),
//            @EnumEntry(value = PERSISTENT_ALL_CACHES, name = "all"),
//    })
//    public int getPersistentDrawingCache() {
//        return mPersistentDrawingCache;
//    }
//
//    /**
//     * Indicates what types of drawing caches should be kept in memory after
//     * they have been created.
//     *
//     * @see #getPersistentDrawingCache()
//     * @see #setAnimationCacheEnabled(boolean)
//     *
//     * @param drawingCacheToKeep one or a combination of {@link #PERSISTENT_NO_CACHE},
//     *        {@link #PERSISTENT_ANIMATION_CACHE}, {@link #PERSISTENT_SCROLLING_CACHE}
//     *        and {@link #PERSISTENT_ALL_CACHES}
//     *
//     * @deprecated The view drawing cache was largely made obsolete with the introduction of
//     * hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
//     * layers are largely unnecessary and can easily result in a net loss in performance due to the
//     * cost of creating and updating the layer. In the rare cases where caching layers are useful,
//     * such as for alpha animations, {@link #setLayerType(int, Paint)} handles this with hardware
//     * rendering. For software-rendered snapshots of a small part of the View hierarchy or
//     * individual Views it is recommended to create a {@link Canvas} from either a {@link Bitmap} or
//     * {@link android.graphics.Picture} and call {@link #draw(Canvas)} on the View. However these
//     * software-rendered usages are discouraged and have compatibility issues with hardware-only
//     * rendering features such as {@link Bitmap.Config#HARDWARE Config.HARDWARE}
//     * bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
//     * reports or unit testing the {@link PixelCopy} API is recommended.
//     */
//    @Deprecated
//    public void setPersistentDrawingCache(int drawingCacheToKeep) {
//        mPersistentDrawingCache = drawingCacheToKeep & PERSISTENT_ALL_CACHES;
//    }
//
//    private void setLayoutMode(int layoutMode, boolean explicitly) {
//        mLayoutMode = layoutMode;
//        setBooleanFlag(FLAG_LAYOUT_MODE_WAS_EXPLICITLY_SET, explicitly);
//    }
//
//    /**
//     * Recursively traverse the view hierarchy, resetting the layoutMode of any
//     * descendants that had inherited a different layoutMode from a previous parent.
//     * Recursion terminates when a descendant's mode is:
//     * <ul>
//     *     <li>Undefined</li>
//     *     <li>The same as the root node's</li>
//     *     <li>A mode that had been explicitly set</li>
//     * <ul/>
//     * The first two clauses are optimizations.
//     * @param layoutModeOfRoot
//     */
//    @Override
//    void invalidateInheritedLayoutMode(int layoutModeOfRoot) {
//        if (mLayoutMode == LAYOUT_MODE_UNDEFINED ||
//                mLayoutMode == layoutModeOfRoot ||
//                hasBooleanFlag(FLAG_LAYOUT_MODE_WAS_EXPLICITLY_SET)) {
//            return;
//        }
//        setLayoutMode(LAYOUT_MODE_UNDEFINED, false);
//
//        // apply recursively
//        for (int i = 0, N = getChildCount(); i < N; i++) {
//            getChildAt(i).invalidateInheritedLayoutMode(layoutModeOfRoot);
//        }
//    }
//
//    /**
//     * Returns the basis of alignment during layout operations on this ViewGroup:
//     * either {@link #LAYOUT_MODE_CLIP_BOUNDS} or {@link #LAYOUT_MODE_OPTICAL_BOUNDS}.
//     * <p>
//     * If no layoutMode was explicitly set, either programmatically or in an XML resource,
//     * the method returns the layoutMode of the view's parent ViewGroup if such a parent exists,
//     * otherwise the method returns a default value of {@link #LAYOUT_MODE_CLIP_BOUNDS}.
//     *
//     * @return the layout mode to use during layout operations
//     *
//     * @see #setLayoutMode(int)
//     */
//    @InspectableProperty(enumMapping = {
//            @EnumEntry(value = LAYOUT_MODE_CLIP_BOUNDS, name = "clipBounds"),
//            @EnumEntry(value = LAYOUT_MODE_OPTICAL_BOUNDS, name = "opticalBounds")
//    })
//    public int getLayoutMode() {
//        if (mLayoutMode == LAYOUT_MODE_UNDEFINED) {
//            int inheritedLayoutMode = (mParent instanceof android.view.ViewGroup) ?
//                    ((android.view.ViewGroup) mParent).getLayoutMode() : LAYOUT_MODE_DEFAULT;
//            setLayoutMode(inheritedLayoutMode, false);
//        }
//        return mLayoutMode;
//    }
//
//    /**
//     * Sets the basis of alignment during the layout of this ViewGroup.
//     * Valid values are either {@link #LAYOUT_MODE_CLIP_BOUNDS} or
//     * {@link #LAYOUT_MODE_OPTICAL_BOUNDS}.
//     *
//     * @param layoutMode the layout mode to use during layout operations
//     *
//     * @see #getLayoutMode()
//     * @attr ref android.R.styleable#ViewGroup_layoutMode
//     */
//    public void setLayoutMode(int layoutMode) {
//        if (mLayoutMode != layoutMode) {
//            invalidateInheritedLayoutMode(layoutMode);
//            setLayoutMode(layoutMode, layoutMode != LAYOUT_MODE_UNDEFINED);
//            requestLayout();
//        }
//    }
//
//    /**
//     * Returns a new set of layout parameters based on the supplied attributes set.
//     *
//     * @param attrs the attributes to build the layout parameters from
//     *
//     * @return an instance of {@link android.view.ViewGroup.LayoutParams} or one
//     *         of its descendants
//     */
//    public android.view.ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) {
//        return new android.view.ViewGroup.LayoutParams(getContext(), attrs);
//    }
//
//    /**
//     * Returns a safe set of layout parameters based on the supplied layout params.
//     * When a ViewGroup is passed a View whose layout params do not pass the test of
//     * {@link #checkLayoutParams(android.view.ViewGroup.LayoutParams)}, this method
//     * is invoked. This method should return a new set of layout params suitable for
//     * this ViewGroup, possibly by copying the appropriate attributes from the
//     * specified set of layout params.
//     *
//     * @param p The layout parameters to convert into a suitable set of layout parameters
//     *          for this ViewGroup.
//     *
//     * @return an instance of {@link android.view.ViewGroup.LayoutParams} or one
//     *         of its descendants
//     */
//    protected android.view.ViewGroup.LayoutParams generateLayoutParams(android.view.ViewGroup.LayoutParams p) {
//        return p;
//    }
//
//    /**
//     * Returns a set of default layout parameters. These parameters are requested
//     * when the View passed to {@link #addView(View)} has no layout parameters
//     * already set. If null is returned, an exception is thrown from addView.
//     *
//     * @return a set of default layout parameters or null
//     */
//    protected android.view.ViewGroup.LayoutParams generateDefaultLayoutParams() {
//        return new android.view.ViewGroup.LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
//    }
//
//    @Override
//    protected void debug(int depth) {
//        super.debug(depth);
//        String output;
//
//        if (mFocused != null) {
//            output = debugIndent(depth);
//            output += "mFocused";
//            Log.d(VIEW_LOG_TAG, output);
//            mFocused.debug(depth + 1);
//        }
//        if (mDefaultFocus != null) {
//            output = debugIndent(depth);
//            output += "mDefaultFocus";
//            Log.d(VIEW_LOG_TAG, output);
//            mDefaultFocus.debug(depth + 1);
//        }
//        if (mFocusedInCluster != null) {
//            output = debugIndent(depth);
//            output += "mFocusedInCluster";
//            Log.d(VIEW_LOG_TAG, output);
//            mFocusedInCluster.debug(depth + 1);
//        }
//        if (mChildrenCount != 0) {
//            output = debugIndent(depth);
//            output += "{";
//            Log.d(VIEW_LOG_TAG, output);
//        }
//        int count = mChildrenCount;
//        for (int i = 0; i < count; i++) {
//            View child = mChildren[i];
//            child.debug(depth + 1);
//        }
//
//        if (mChildrenCount != 0) {
//            output = debugIndent(depth);
//            output += "}";
//            Log.d(VIEW_LOG_TAG, output);
//        }
//    }
//
//    /**
//     * Returns the position in the group of the specified child view.
//     *
//     * @param child the view for which to get the position
//     * @return a positive integer representing the position of the view in the
//     *         group, or -1 if the view does not exist in the group
//     */
//    public int indexOfChild(View child) {
//        final int count = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < count; i++) {
//            if (children[i] == child) {
//                return i;
//            }
//        }
//        return -1;
//    }
//
//    /**
//     * Returns the number of children in the group.
//     *
//     * @return a positive integer representing the number of children in
//     *         the group
//     */
//    public int getChildCount() {
//        return mChildrenCount;
//    }
//
//    /**
//     * Returns the view at the specified position in the group.
//     *
//     * @param index the position at which to get the view from
//     * @return the view at the specified position or null if the position
//     *         does not exist within the group
//     */
//    public View getChildAt(int index) {
//        if (index < 0 || index >= mChildrenCount) {
//            return null;
//        }
//        return mChildren[index];
//    }
//
//    /**
//     * Ask all of the children of this view to measure themselves, taking into
//     * account both the MeasureSpec requirements for this view and its padding.
//     * We skip children that are in the GONE state The heavy lifting is done in
//     * getChildMeasureSpec.
//     *
//     * @param widthMeasureSpec The width requirements for this view
//     * @param heightMeasureSpec The height requirements for this view
//     */
//    protected void measureChildren(int widthMeasureSpec, int heightMeasureSpec) {
//        final int size = mChildrenCount;
//        final View[] children = mChildren;
//        for (int i = 0; i < size; ++i) {
//            final View child = children[i];
//            if ((child.mViewFlags & VISIBILITY_MASK) != GONE) {
//                measureChild(child, widthMeasureSpec, heightMeasureSpec);
//            }
//        }
//    }
//
//    /**
//     * Ask one of the children of this view to measure itself, taking into
//     * account both the MeasureSpec requirements for this view and its padding.
//     * The heavy lifting is done in getChildMeasureSpec.
//     *
//     * @param child The child to measure
//     * @param parentWidthMeasureSpec The width requirements for this view
//     * @param parentHeightMeasureSpec The height requirements for this view
//     */
//    protected void measureChild(View child, int parentWidthMeasureSpec,
//                                int parentHeightMeasureSpec) {
//        final android.view.ViewGroup.LayoutParams lp = child.getLayoutParams();
//
//        final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec,
//                mPaddingLeft + mPaddingRight, lp.width);
//        final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec,
//                mPaddingTop + mPaddingBottom, lp.height);
//
//        child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
//    }
//
//    /**
//     * Ask one of the children of this view to measure itself, taking into
//     * account both the MeasureSpec requirements for this view and its padding
//     * and margins. The child must have MarginLayoutParams The heavy lifting is
//     * done in getChildMeasureSpec.
//     *
//     * @param child The child to measure
//     * @param parentWidthMeasureSpec The width requirements for this view
//     * @param widthUsed Extra space that has been used up by the parent
//     *        horizontally (possibly by other children of the parent)
//     * @param parentHeightMeasureSpec The height requirements for this view
//     * @param heightUsed Extra space that has been used up by the parent
//     *        vertically (possibly by other children of the parent)
//     */
//    protected void measureChildWithMargins(View child,
//                                           int parentWidthMeasureSpec, int widthUsed,
//                                           int parentHeightMeasureSpec, int heightUsed) {
//        final android.view.ViewGroup.MarginLayoutParams lp = (android.view.ViewGroup.MarginLayoutParams) child.getLayoutParams();
//
//        final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec,
//                mPaddingLeft + mPaddingRight + lp.leftMargin + lp.rightMargin
//                        + widthUsed, lp.width);
//        final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec,
//                mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin
//                        + heightUsed, lp.height);
//
//        child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
//    }
//
//    /**
//     * Does the hard part of measureChildren: figuring out the MeasureSpec to
//     * pass to a particular child. This method figures out the right MeasureSpec
//     * for one dimension (height or width) of one child view.
//     *
//     * The goal is to combine information from our MeasureSpec with the
//     * LayoutParams of the child to get the best possible results. For example,
//     * if the this view knows its size (because its MeasureSpec has a mode of
//     * EXACTLY), and the child has indicated in its LayoutParams that it wants
//     * to be the same size as the parent, the parent should ask the child to
//     * layout given an exact size.
//     *
//     * @param spec The requirements for this view
//     * @param padding The padding of this view for the current dimension and
//     *        margins, if applicable
//     * @param childDimension How big the child wants to be in the current
//     *        dimension
//     * @return a MeasureSpec integer for the child
//     */
//    public static int getChildMeasureSpec(int spec, int padding, int childDimension) {
//        int specMode = MeasureSpec.getMode(spec);
//        int specSize = MeasureSpec.getSize(spec);
//
//        int size = Math.max(0, specSize - padding);
//
//        int resultSize = 0;
//        int resultMode = 0;
//
//        switch (specMode) {
//            // Parent has imposed an exact size on us
//            case MeasureSpec.EXACTLY:
//                if (childDimension >= 0) {
//                    resultSize = childDimension;
//                    resultMode = MeasureSpec.EXACTLY;
//                } else if (childDimension == android.view.ViewGroup.LayoutParams.MATCH_PARENT) {
//                    // Child wants to be our size. So be it.
//                    resultSize = size;
//                    resultMode = MeasureSpec.EXACTLY;
//                } else if (childDimension == android.view.ViewGroup.LayoutParams.WRAP_CONTENT) {
//                    // Child wants to determine its own size. It can't be
//                    // bigger than us.
//                    resultSize = size;
//                    resultMode = MeasureSpec.AT_MOST;
//                }
//                break;
//
//            // Parent has imposed a maximum size on us
//            case MeasureSpec.AT_MOST:
//                if (childDimension >= 0) {
//                    // Child wants a specific size... so be it
//                    resultSize = childDimension;
//                    resultMode = MeasureSpec.EXACTLY;
//                } else if (childDimension == android.view.ViewGroup.LayoutParams.MATCH_PARENT) {
//                    // Child wants to be our size, but our size is not fixed.
//                    // Constrain child to not be bigger than us.
//                    resultSize = size;
//                    resultMode = MeasureSpec.AT_MOST;
//                } else if (childDimension == android.view.ViewGroup.LayoutParams.WRAP_CONTENT) {
//                    // Child wants to determine its own size. It can't be
//                    // bigger than us.
//                    resultSize = size;
//                    resultMode = MeasureSpec.AT_MOST;
//                }
//                break;
//
//            // Parent asked to see how big we want to be
//            case MeasureSpec.UNSPECIFIED:
//                if (childDimension >= 0) {
//                    // Child wants a specific size... let him have it
//                    resultSize = childDimension;
//                    resultMode = MeasureSpec.EXACTLY;
//                } else if (childDimension == android.view.ViewGroup.LayoutParams.MATCH_PARENT) {
//                    // Child wants to be our size... find out how big it should
//                    // be
//                    resultSize = View.sUseZeroUnspecifiedMeasureSpec ? 0 : size;
//                    resultMode = MeasureSpec.UNSPECIFIED;
//                } else if (childDimension == android.view.ViewGroup.LayoutParams.WRAP_CONTENT) {
//                    // Child wants to determine its own size.... find out how
//                    // big it should be
//                    resultSize = View.sUseZeroUnspecifiedMeasureSpec ? 0 : size;
//                    resultMode = MeasureSpec.UNSPECIFIED;
//                }
//                break;
//        }
//        //noinspection ResourceType
//        return MeasureSpec.makeMeasureSpec(resultSize, resultMode);
//    }
//
//
//    /**
//     * Removes any pending animations for views that have been removed. Call
//     * this if you don't want animations for exiting views to stack up.
//     */
//    public void clearDisappearingChildren() {
//        final ArrayList<View> disappearingChildren = mDisappearingChildren;
//        if (disappearingChildren != null) {
//            final int count = disappearingChildren.size();
//            for (int i = 0; i < count; i++) {
//                final View view = disappearingChildren.get(i);
//                if (view.mAttachInfo != null) {
//                    view.dispatchDetachedFromWindow();
//                }
//                view.clearAnimation();
//            }
//            disappearingChildren.clear();
//            invalidate();
//        }
//    }
//
//    /**
//     * Add a view which is removed from mChildren but still needs animation
//     *
//     * @param v View to add
//     */
//    private void addDisappearingView(View v) {
//        ArrayList<View> disappearingChildren = mDisappearingChildren;
//
//        if (disappearingChildren == null) {
//            disappearingChildren = mDisappearingChildren = new ArrayList<View>();
//        }
//
//        disappearingChildren.add(v);
//    }
//
//    /**
//     * Cleanup a view when its animation is done. This may mean removing it from
//     * the list of disappearing views.
//     *
//     * @param view The view whose animation has finished
//     * @param animation The animation, cannot be null
//     */
//    void finishAnimatingView(final View view, Animation animation) {
//        final ArrayList<View> disappearingChildren = mDisappearingChildren;
//        if (disappearingChildren != null) {
//            if (disappearingChildren.contains(view)) {
//                disappearingChildren.remove(view);
//
//                if (view.mAttachInfo != null) {
//                    view.dispatchDetachedFromWindow();
//                }
//
//                view.clearAnimation();
//                mGroupFlags |= FLAG_INVALIDATE_REQUIRED;
//            }
//        }
//
//        if (animation != null && !animation.getFillAfter()) {
//            view.clearAnimation();
//        }
//
//        if ((view.mPrivateFlags & PFLAG_ANIMATION_STARTED) == PFLAG_ANIMATION_STARTED) {
//            view.onAnimationEnd();
//            // Should be performed by onAnimationEnd() but this avoid an infinite loop,
//            // so we'd rather be safe than sorry
//            view.mPrivateFlags &= ~PFLAG_ANIMATION_STARTED;
//            // Draw one more frame after the animation is done
//            mGroupFlags |= FLAG_INVALIDATE_REQUIRED;
//        }
//    }
//
//    /**
//     * Utility function called by View during invalidation to determine whether a view that
//     * is invisible or gone should still be invalidated because it is being transitioned (and
//     * therefore still needs to be drawn).
//     */
//    boolean isViewTransitioning(View view) {
//        return (mTransitioningViews != null && mTransitioningViews.contains(view));
//    }
//
//    /**
//     * This method tells the ViewGroup that the given View object, which should have this
//     * ViewGroup as its parent,
//     * should be kept around  (re-displayed when the ViewGroup draws its children) even if it
//     * is removed from its parent. This allows animations, such as those used by
//     * {@link android.app.Fragment} and {@link LayoutTransition} to animate
//     * the removal of views. A call to this method should always be accompanied by a later call
//     * to {@link #endViewTransition(View)}, such as after an animation on the View has finished,
//     * so that the View finally gets removed.
//     *
//     * @param view The View object to be kept visible even if it gets removed from its parent.
//     */
//    public void startViewTransition(View view) {
//        if (view.mParent == this) {
//            if (mTransitioningViews == null) {
//                mTransitioningViews = new ArrayList<View>();
//            }
//            mTransitioningViews.add(view);
//        }
//    }
//
//    /**
//     * This method should always be called following an earlier call to
//     * {@link #startViewTransition(View)}. The given View is finally removed from its parent
//     * and will no longer be displayed. Note that this method does not perform the functionality
//     * of removing a view from its parent; it just discontinues the display of a View that
//     * has previously been removed.
//     *
//     * @return view The View object that has been removed but is being kept around in the visible
//     * hierarchy by an earlier call to {@link #startViewTransition(View)}.
//     */
//    public void endViewTransition(View view) {
//        if (mTransitioningViews != null) {
//            mTransitioningViews.remove(view);
//            final ArrayList<View> disappearingChildren = mDisappearingChildren;
//            if (disappearingChildren != null && disappearingChildren.contains(view)) {
//                disappearingChildren.remove(view);
//                if (mVisibilityChangingChildren != null &&
//                        mVisibilityChangingChildren.contains(view)) {
//                    mVisibilityChangingChildren.remove(view);
//                } else {
//                    if (view.mAttachInfo != null) {
//                        view.dispatchDetachedFromWindow();
//                    }
//                    if (view.mParent != null) {
//                        view.mParent = null;
//                    }
//                }
//                invalidate();
//            }
//        }
//    }
//
//    private LayoutTransition.TransitionListener mLayoutTransitionListener =
//            new LayoutTransition.TransitionListener() {
//                @Override
//                public void startTransition(LayoutTransition transition, android.view.ViewGroup container,
//                                            View view, int transitionType) {
//                    // We only care about disappearing items, since we need special logic to keep
//                    // those items visible after they've been 'removed'
//                    if (transitionType == LayoutTransition.DISAPPEARING) {
//                        startViewTransition(view);
//                    }
//                }
//
//                @Override
//                public void endTransition(LayoutTransition transition, android.view.ViewGroup container,
//                                          View view, int transitionType) {
//                    if (mLayoutCalledWhileSuppressed && !transition.isChangingLayout()) {
//                        requestLayout();
//                        mLayoutCalledWhileSuppressed = false;
//                    }
//                    if (transitionType == LayoutTransition.DISAPPEARING && mTransitioningViews != null) {
//                        endViewTransition(view);
//                    }
//                }
//            };
//
//    /**
//     * Tells this ViewGroup to suppress all layout() calls until layout
//     * suppression is disabled with a later call to suppressLayout(false).
//     * When layout suppression is disabled, a requestLayout() call is sent
//     * if layout() was attempted while layout was being suppressed.
//     */
//    public void suppressLayout(boolean suppress) {
//        mSuppressLayout = suppress;
//        if (!suppress) {
//            if (mLayoutCalledWhileSuppressed) {
//                requestLayout();
//                mLayoutCalledWhileSuppressed = false;
//            }
//        }
//    }
//
//    /**
//     * Returns whether layout calls on this container are currently being
//     * suppressed, due to an earlier call to {@link #suppressLayout(boolean)}.
//     *
//     * @return true if layout calls are currently suppressed, false otherwise.
//     */
//    public boolean isLayoutSuppressed() {
//        return mSuppressLayout;
//    }
//
//    @Override
//    public boolean gatherTransparentRegion(Region region) {
//        // If no transparent regions requested, we are always opaque.
//        final boolean meOpaque = (mPrivateFlags & View.PFLAG_REQUEST_TRANSPARENT_REGIONS) == 0;
//        if (meOpaque && region == null) {
//            // The caller doesn't care about the region, so stop now.
//            return true;
//        }
//        super.gatherTransparentRegion(region);
//        // Instead of naively traversing the view tree, we have to traverse according to the Z
//        // order here. We need to go with the same order as dispatchDraw().
//        // One example is that after surfaceView punch a hole, we will still allow other views drawn
//        // on top of that hole. In this case, those other views should be able to cut the
//        // transparent region into smaller area.
//        final int childrenCount = mChildrenCount;
//        boolean noneOfTheChildrenAreTransparent = true;
//        if (childrenCount > 0) {
//            final ArrayList<View> preorderedList = buildOrderedChildList();
//            final boolean customOrder = preorderedList == null
//                    && isChildrenDrawingOrderEnabled();
//            final View[] children = mChildren;
//            for (int i = 0; i < childrenCount; i++) {
//                final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//                final View child = getAndVerifyPreorderedView(preorderedList, children, childIndex);
//                if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE || child.getAnimation() != null) {
//                    if (!child.gatherTransparentRegion(region)) {
//                        noneOfTheChildrenAreTransparent = false;
//                    }
//                }
//            }
//            if (preorderedList != null) preorderedList.clear();
//        }
//        return meOpaque || noneOfTheChildrenAreTransparent;
//    }
//
//    @Override
//    public void requestTransparentRegion(View child) {
//        if (child != null) {
//            child.mPrivateFlags |= View.PFLAG_REQUEST_TRANSPARENT_REGIONS;
//            if (mParent != null) {
//                mParent.requestTransparentRegion(this);
//            }
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public void subtractObscuredTouchableRegion(Region touchableRegion, View view) {
//        final int childrenCount = mChildrenCount;
//        final ArrayList<View> preorderedList = buildTouchDispatchChildList();
//        final boolean customOrder = preorderedList == null && isChildrenDrawingOrderEnabled();
//        final View[] children = mChildren;
//        for (int i = childrenCount - 1; i >= 0; i--) {
//            final int childIndex = getAndVerifyPreorderedIndex(childrenCount, i, customOrder);
//            final View child = getAndVerifyPreorderedView(preorderedList, children, childIndex);
//            if (child == view) {
//                // We've reached the target view.
//                break;
//            }
//            if (!child.canReceivePointerEvents()) {
//                // This child cannot be touched. Skip it.
//                continue;
//            }
//            applyOpToRegionByBounds(touchableRegion, child, Region.Op.DIFFERENCE);
//        }
//
//        // The touchable region should not exceed the bounds of its container.
//        applyOpToRegionByBounds(touchableRegion, this, Region.Op.INTERSECT);
//
//        final ViewParent parent = getParent();
//        if (parent != null) {
//            parent.subtractObscuredTouchableRegion(touchableRegion, this);
//        }
//    }
//
//    private static void applyOpToRegionByBounds(Region region, View view, Region.Op op) {
//        final int[] locationInWindow = new int[2];
//        view.getLocationInWindow(locationInWindow);
//        final int x = locationInWindow[0];
//        final int y = locationInWindow[1];
//        region.op(x, y, x + view.getWidth(), y + view.getHeight(), op);
//    }
//
//    @Override
//    public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) {
//        insets = super.dispatchApplyWindowInsets(insets);
//        if (insets.isConsumed()) {
//            return insets;
//        }
//        if (View.sBrokenInsetsDispatch) {
//            return brokenDispatchApplyWindowInsets(insets);
//        } else {
//            return newDispatchApplyWindowInsets(insets);
//        }
//    }
//
//    private WindowInsets brokenDispatchApplyWindowInsets(WindowInsets insets) {
//        final int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            insets = getChildAt(i).dispatchApplyWindowInsets(insets);
//            if (insets.isConsumed()) {
//                break;
//            }
//        }
//        return insets;
//    }
//
//    private WindowInsets newDispatchApplyWindowInsets(WindowInsets insets) {
//        final int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            getChildAt(i).dispatchApplyWindowInsets(insets);
//        }
//        return insets;
//    }
//
//    @Override
//    public void setWindowInsetsAnimationCallback(
//            @Nullable WindowInsetsAnimation.Callback callback) {
//        super.setWindowInsetsAnimationCallback(callback);
//        mInsetsAnimationDispatchMode = callback != null
//                ? callback.getDispatchMode()
//                : DISPATCH_MODE_CONTINUE_ON_SUBTREE;
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public boolean hasWindowInsetsAnimationCallback() {
//        if (super.hasWindowInsetsAnimationCallback()) {
//            return true;
//        }
//
//        // If we are root-level content view that fits insets, we imitate consuming behavior, so
//        // no child will retrieve window insets animation callback.
//        // See dispatchWindowInsetsAnimationPrepare.
//        boolean isOptionalFitSystemWindows = (mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) != 0
//                || isFrameworkOptionalFitsSystemWindows();
//        if (isOptionalFitSystemWindows && mAttachInfo != null
//                && mAttachInfo.mContentOnApplyWindowInsetsListener != null
//                && (getWindowSystemUiVisibility() & SYSTEM_UI_LAYOUT_FLAGS) == 0) {
//            return false;
//        }
//
//        final int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            if (getChildAt(i).hasWindowInsetsAnimationCallback()) {
//                return true;
//            }
//        }
//        return false;
//    }
//
//    @Override
//    public void dispatchWindowInsetsAnimationPrepare(
//            @NonNull WindowInsetsAnimation animation) {
//        super.dispatchWindowInsetsAnimationPrepare(animation);
//
//        // If we are root-level content view that fits insets, set dispatch mode to stop to imitate
//        // consume behavior.
//        boolean isOptionalFitSystemWindows = (mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) != 0
//                || isFrameworkOptionalFitsSystemWindows();
//        if (isOptionalFitSystemWindows && mAttachInfo != null
//                && getListenerInfo().mWindowInsetsAnimationCallback == null
//                && mAttachInfo.mContentOnApplyWindowInsetsListener != null
//                && (getWindowSystemUiVisibility() & SYSTEM_UI_LAYOUT_FLAGS) == 0) {
//            mInsetsAnimationDispatchMode = DISPATCH_MODE_STOP;
//            return;
//        }
//
//        if (mInsetsAnimationDispatchMode == DISPATCH_MODE_STOP) {
//            return;
//        }
//        final int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            getChildAt(i).dispatchWindowInsetsAnimationPrepare(animation);
//        }
//    }
//
//    @Override
//    @NonNull
//    public Bounds dispatchWindowInsetsAnimationStart(
//            @NonNull WindowInsetsAnimation animation, @NonNull Bounds bounds) {
//        bounds = super.dispatchWindowInsetsAnimationStart(animation, bounds);
//        if (mInsetsAnimationDispatchMode == DISPATCH_MODE_STOP) {
//            return bounds;
//        }
//        final int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            getChildAt(i).dispatchWindowInsetsAnimationStart(animation, bounds);
//        }
//        return bounds;
//    }
//
//    @Override
//    @NonNull
//    public WindowInsets dispatchWindowInsetsAnimationProgress(@NonNull WindowInsets insets,
//                                                              @NonNull List<WindowInsetsAnimation> runningAnimations) {
//        insets = super.dispatchWindowInsetsAnimationProgress(insets, runningAnimations);
//        if (mInsetsAnimationDispatchMode == DISPATCH_MODE_STOP) {
//            return insets;
//        }
//        final int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            getChildAt(i).dispatchWindowInsetsAnimationProgress(insets, runningAnimations);
//        }
//        return insets;
//    }
//
//    @Override
//    public void dispatchWindowInsetsAnimationEnd(@NonNull WindowInsetsAnimation animation) {
//        super.dispatchWindowInsetsAnimationEnd(animation);
//        if (mInsetsAnimationDispatchMode == DISPATCH_MODE_STOP) {
//            return;
//        }
//        final int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            getChildAt(i).dispatchWindowInsetsAnimationEnd(animation);
//        }
//    }
//
//    /**
//     * Offsets the given rectangle in parent's local coordinates into child's coordinate space
//     * and clips the result to the child View's bounds, padding and clipRect if appropriate. If the
//     * resulting rectangle is not empty, the request is forwarded to the child.
//     * <p>
//     * Note: This method does not account for any static View transformations which may be
//     * applied to the child view.
//     *
//     * @param child            the child to dispatch to
//     * @param localVisibleRect the visible (clipped) area of this ViewGroup, in local coordinates
//     * @param windowOffset     the offset of localVisibleRect within the window
//     * @param targets          a queue to collect located targets
//     */
//    private void dispatchTransformedScrollCaptureSearch(View child, Rect localVisibleRect,
//                                                        Point windowOffset, Queue<ScrollCaptureTarget> targets) {
//
//        // copy local visible rect for modification and dispatch
//        final Rect childVisibleRect = getTempRect();
//        childVisibleRect.set(localVisibleRect);
//
//        // transform to child coords
//        final Point childWindowOffset = getTempPoint();
//        childWindowOffset.set(windowOffset.x, windowOffset.y);
//
//        final int dx = child.mLeft - mScrollX;
//        final int dy = child.mTop - mScrollY;
//
//        childVisibleRect.offset(-dx, -dy);
//        childWindowOffset.offset(dx, dy);
//
//        boolean rectIsVisible = true;
//        final int width = mRight - mLeft;
//        final int height = mBottom - mTop;
//
//        // Clip to child bounds
//        if (getClipChildren()) {
//            rectIsVisible = childVisibleRect.intersect(0, 0, child.getWidth(), child.getHeight());
//        }
//
//        // Clip to child padding.
//        if (rectIsVisible && (child instanceof android.view.ViewGroup)
//                && ((android.view.ViewGroup) child).getClipToPadding()) {
//            rectIsVisible = childVisibleRect.intersect(
//                    child.mPaddingLeft, child.mPaddingTop,
//                    child.getWidth() - child.mPaddingRight,
//                    child.getHeight() - child.mPaddingBottom);
//        }
//        // Clip to child clipBounds.
//        if (rectIsVisible && child.mClipBounds != null) {
//            rectIsVisible = childVisibleRect.intersect(child.mClipBounds);
//        }
//        if (rectIsVisible) {
//            child.dispatchScrollCaptureSearch(childVisibleRect, childWindowOffset, targets);
//        }
//    }
//
//    /**
//     * Handle the scroll capture search request by checking this view if applicable, then to each
//     * child view.
//     *
//     * @param localVisibleRect the visible area of this ViewGroup in local coordinates, according to
//     *                         the parent
//     * @param windowOffset     the offset of this view within the window
//     * @param targets          the collected list of scroll capture targets
//     *
//     * @hide
//     */
//    @Override
//    public void dispatchScrollCaptureSearch(
//            @NonNull Rect localVisibleRect, @NonNull Point windowOffset,
//            @NonNull Queue<ScrollCaptureTarget> targets) {
//
//        // Dispatch to self first.
//        super.dispatchScrollCaptureSearch(localVisibleRect, windowOffset, targets);
//
//        // Then dispatch to children, if not excluding descendants.
//        if ((getScrollCaptureHint() & SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS) == 0) {
//            final int childCount = getChildCount();
//            for (int i = 0; i < childCount; i++) {
//                View child = getChildAt(i);
//                // Only visible views can be captured.
//                if (child.getVisibility() != View.VISIBLE) {
//                    continue;
//                }
//                // Transform to child coords and dispatch
//                dispatchTransformedScrollCaptureSearch(child, localVisibleRect, windowOffset,
//                        targets);
//            }
//        }
//    }
//
//    /**
//     * Returns the animation listener to which layout animation events are
//     * sent.
//     *
//     * @return an {@link Animation.AnimationListener}
//     */
//    public Animation.AnimationListener getLayoutAnimationListener() {
//        return mAnimationListener;
//    }
//
//    @Override
//    protected void drawableStateChanged() {
//        super.drawableStateChanged();
//
//        if ((mGroupFlags & FLAG_NOTIFY_CHILDREN_ON_DRAWABLE_STATE_CHANGE) != 0) {
//            if ((mGroupFlags & FLAG_ADD_STATES_FROM_CHILDREN) != 0) {
//                throw new IllegalStateException("addStateFromChildren cannot be enabled if a"
//                        + " child has duplicateParentState set to true");
//            }
//
//            final View[] children = mChildren;
//            final int count = mChildrenCount;
//
//            for (int i = 0; i < count; i++) {
//                final View child = children[i];
//                if ((child.mViewFlags & DUPLICATE_PARENT_STATE) != 0) {
//                    child.refreshDrawableState();
//                }
//            }
//        }
//    }
//
//    @Override
//    public void jumpDrawablesToCurrentState() {
//        super.jumpDrawablesToCurrentState();
//        final View[] children = mChildren;
//        final int count = mChildrenCount;
//        for (int i = 0; i < count; i++) {
//            children[i].jumpDrawablesToCurrentState();
//        }
//    }
//
//    @Override
//    protected int[] onCreateDrawableState(int extraSpace) {
//        if ((mGroupFlags & FLAG_ADD_STATES_FROM_CHILDREN) == 0) {
//            return super.onCreateDrawableState(extraSpace);
//        }
//
//        int need = 0;
//        int n = getChildCount();
//        for (int i = 0; i < n; i++) {
//            int[] childState = getChildAt(i).getDrawableState();
//
//            if (childState != null) {
//                need += childState.length;
//            }
//        }
//
//        int[] state = super.onCreateDrawableState(extraSpace + need);
//
//        for (int i = 0; i < n; i++) {
//            int[] childState = getChildAt(i).getDrawableState();
//
//            if (childState != null) {
//                state = mergeDrawableStates(state, childState);
//            }
//        }
//
//        return state;
//    }
//
//    /**
//     * Sets whether this ViewGroup's drawable states also include
//     * its children's drawable states.  This is used, for example, to
//     * make a group appear to be focused when its child EditText or button
//     * is focused.
//     */
//    public void setAddStatesFromChildren(boolean addsStates) {
//        if (addsStates) {
//            mGroupFlags |= FLAG_ADD_STATES_FROM_CHILDREN;
//        } else {
//            mGroupFlags &= ~FLAG_ADD_STATES_FROM_CHILDREN;
//        }
//
//        refreshDrawableState();
//    }
//
//    /**
//     * Returns whether this ViewGroup's drawable states also include
//     * its children's drawable states.  This is used, for example, to
//     * make a group appear to be focused when its child EditText or button
//     * is focused.
//     */
//    @InspectableProperty
//    public boolean addStatesFromChildren() {
//        return (mGroupFlags & FLAG_ADD_STATES_FROM_CHILDREN) != 0;
//    }
//
//    /**
//     * If {@link #addStatesFromChildren} is true, refreshes this group's
//     * drawable state (to include the states from its children).
//     */
//    @Override
//    public void childDrawableStateChanged(View child) {
//        if ((mGroupFlags & FLAG_ADD_STATES_FROM_CHILDREN) != 0) {
//            refreshDrawableState();
//        }
//    }
//
//    /**
//     * Specifies the animation listener to which layout animation events must
//     * be sent. Only
//     * {@link Animation.AnimationListener#onAnimationStart(Animation)}
//     * and
//     * {@link Animation.AnimationListener#onAnimationEnd(Animation)}
//     * are invoked.
//     *
//     * @param animationListener the layout animation listener
//     */
//    public void setLayoutAnimationListener(Animation.AnimationListener animationListener) {
//        mAnimationListener = animationListener;
//    }
//
//    /**
//     * This method is called by LayoutTransition when there are 'changing' animations that need
//     * to start after the layout/setup phase. The request is forwarded to the ViewAncestor, who
//     * starts all pending transitions prior to the drawing phase in the current traversal.
//     *
//     * @param transition The LayoutTransition to be started on the next traversal.
//     *
//     * @hide
//     */
//    public void requestTransitionStart(LayoutTransition transition) {
//        ViewRootImpl viewAncestor = getViewRootImpl();
//        if (viewAncestor != null) {
//            viewAncestor.requestTransitionStart(transition);
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public boolean resolveRtlPropertiesIfNeeded() {
//        final boolean result = super.resolveRtlPropertiesIfNeeded();
//        // We dont need to resolve the children RTL properties if nothing has changed for the parent
//        if (result) {
//            int count = getChildCount();
//            for (int i = 0; i < count; i++) {
//                final View child = getChildAt(i);
//                if (child.isLayoutDirectionInherited()) {
//                    child.resolveRtlPropertiesIfNeeded();
//                }
//            }
//        }
//        return result;
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public boolean resolveLayoutDirection() {
//        final boolean result = super.resolveLayoutDirection();
//        if (result) {
//            int count = getChildCount();
//            for (int i = 0; i < count; i++) {
//                final View child = getChildAt(i);
//                if (child.isLayoutDirectionInherited()) {
//                    child.resolveLayoutDirection();
//                }
//            }
//        }
//        return result;
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public boolean resolveTextDirection() {
//        final boolean result = super.resolveTextDirection();
//        if (result) {
//            int count = getChildCount();
//            for (int i = 0; i < count; i++) {
//                final View child = getChildAt(i);
//                if (child.isTextDirectionInherited()) {
//                    child.resolveTextDirection();
//                }
//            }
//        }
//        return result;
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public boolean resolveTextAlignment() {
//        final boolean result = super.resolveTextAlignment();
//        if (result) {
//            int count = getChildCount();
//            for (int i = 0; i < count; i++) {
//                final View child = getChildAt(i);
//                if (child.isTextAlignmentInherited()) {
//                    child.resolveTextAlignment();
//                }
//            }
//        }
//        return result;
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    @UnsupportedAppUsage
//    public void resolvePadding() {
//        super.resolvePadding();
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            final View child = getChildAt(i);
//            if (child.isLayoutDirectionInherited() && !child.isPaddingResolved()) {
//                child.resolvePadding();
//            }
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    protected void resolveDrawables() {
//        super.resolveDrawables();
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            final View child = getChildAt(i);
//            if (child.isLayoutDirectionInherited() && !child.areDrawablesResolved()) {
//                child.resolveDrawables();
//            }
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @Override
//    public void resolveLayoutParams() {
//        super.resolveLayoutParams();
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            final View child = getChildAt(i);
//            child.resolveLayoutParams();
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @TestApi
//    @Override
//    public void resetResolvedLayoutDirection() {
//        super.resetResolvedLayoutDirection();
//
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            final View child = getChildAt(i);
//            if (child.isLayoutDirectionInherited()) {
//                child.resetResolvedLayoutDirection();
//            }
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @TestApi
//    @Override
//    public void resetResolvedTextDirection() {
//        super.resetResolvedTextDirection();
//
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            final View child = getChildAt(i);
//            if (child.isTextDirectionInherited()) {
//                child.resetResolvedTextDirection();
//            }
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @TestApi
//    @Override
//    public void resetResolvedTextAlignment() {
//        super.resetResolvedTextAlignment();
//
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            final View child = getChildAt(i);
//            if (child.isTextAlignmentInherited()) {
//                child.resetResolvedTextAlignment();
//            }
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @TestApi
//    @Override
//    public void resetResolvedPadding() {
//        super.resetResolvedPadding();
//
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            final View child = getChildAt(i);
//            if (child.isLayoutDirectionInherited()) {
//                child.resetResolvedPadding();
//            }
//        }
//    }
//
//    /**
//     * @hide
//     */
//    @TestApi
//    @Override
//    protected void resetResolvedDrawables() {
//        super.resetResolvedDrawables();
//
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            final View child = getChildAt(i);
//            if (child.isLayoutDirectionInherited()) {
//                child.resetResolvedDrawables();
//            }
//        }
//    }
//
//    /**
//     * Return true if the pressed state should be delayed for children or descendants of this
//     * ViewGroup. Generally, this should be done for containers that can scroll, such as a List.
//     * This prevents the pressed state from appearing when the user is actually trying to scroll
//     * the content.
//     *
//     * The default implementation returns true for compatibility reasons. Subclasses that do
//     * not scroll should generally override this method and return false.
//     */
//    public boolean shouldDelayChildPressedState() {
//        return true;
//    }
//
//    /**
//     * @inheritDoc
//     */
//    @Override
//    public boolean onStartNestedScroll(View child, View target, int nestedScrollAxes) {
//        return false;
//    }
//
//    /**
//     * @inheritDoc
//     */
//    @Override
//    public void onNestedScrollAccepted(View child, View target, int axes) {
//        mNestedScrollAxes = axes;
//    }
//
//    /**
//     * @inheritDoc
//     *
//     * <p>The default implementation of onStopNestedScroll calls
//     * {@link #stopNestedScroll()} to halt any recursive nested scrolling in progress.</p>
//     */
//    @Override
//    public void onStopNestedScroll(View child) {
//        // Stop any recursive nested scrolling.
//        stopNestedScroll();
//        mNestedScrollAxes = 0;
//    }
//
//    /**
//     * @inheritDoc
//     */
//    @Override
//    public void onNestedScroll(View target, int dxConsumed, int dyConsumed,
//                               int dxUnconsumed, int dyUnconsumed) {
//        // Re-dispatch up the tree by default
//        dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, null);
//    }
//
//    /**
//     * @inheritDoc
//     */
//    @Override
//    public void onNestedPreScroll(View target, int dx, int dy, int[] consumed) {
//        // Re-dispatch up the tree by default
//        dispatchNestedPreScroll(dx, dy, consumed, null);
//    }
//
//    /**
//     * @inheritDoc
//     */
//    @Override
//    public boolean onNestedFling(View target, float velocityX, float velocityY, boolean consumed) {
//        // Re-dispatch up the tree by default
//        return dispatchNestedFling(velocityX, velocityY, consumed);
//    }
//
//    /**
//     * @inheritDoc
//     */
//    @Override
//    public boolean onNestedPreFling(View target, float velocityX, float velocityY) {
//        // Re-dispatch up the tree by default
//        return dispatchNestedPreFling(velocityX, velocityY);
//    }
//
//    /**
//     * Return the current axes of nested scrolling for this ViewGroup.
//     *
//     * <p>A ViewGroup returning something other than {@link #SCROLL_AXIS_NONE} is currently
//     * acting as a nested scrolling parent for one or more descendant views in the hierarchy.</p>
//     *
//     * @return Flags indicating the current axes of nested scrolling
//     * @see #SCROLL_AXIS_HORIZONTAL
//     * @see #SCROLL_AXIS_VERTICAL
//     * @see #SCROLL_AXIS_NONE
//     */
//    public int getNestedScrollAxes() {
//        return mNestedScrollAxes;
//    }
//
//    /** @hide */
//    protected void onSetLayoutParams(View child, android.view.ViewGroup.LayoutParams layoutParams) {
//        requestLayout();
//    }
//
//    /** @hide */
//    @Override
//    public void captureTransitioningViews(List<View> transitioningViews) {
//        if (getVisibility() != View.VISIBLE) {
//            return;
//        }
//        if (isTransitionGroup()) {
//            transitioningViews.add(this);
//        } else {
//            int count = getChildCount();
//            for (int i = 0; i < count; i++) {
//                View child = getChildAt(i);
//                child.captureTransitioningViews(transitioningViews);
//            }
//        }
//    }
//
//    /** @hide */
//    @Override
//    public void findNamedViews(Map<String, View> namedElements) {
//        if (getVisibility() != VISIBLE && mGhostView == null) {
//            return;
//        }
//        super.findNamedViews(namedElements);
//        int count = getChildCount();
//        for (int i = 0; i < count; i++) {
//            View child = getChildAt(i);
//            child.findNamedViews(namedElements);
//        }
//    }
//
//    @Override
//    boolean hasUnhandledKeyListener() {
//        return (mChildUnhandledKeyListeners > 0) || super.hasUnhandledKeyListener();
//    }
//
//    void incrementChildUnhandledKeyListeners() {
//        mChildUnhandledKeyListeners += 1;
//        if (mChildUnhandledKeyListeners == 1) {
//            if (mParent instanceof android.view.ViewGroup) {
//                ((android.view.ViewGroup) mParent).incrementChildUnhandledKeyListeners();
//            }
//        }
//    }
//
//    void decrementChildUnhandledKeyListeners() {
//        mChildUnhandledKeyListeners -= 1;
//        if (mChildUnhandledKeyListeners == 0) {
//            if (mParent instanceof android.view.ViewGroup) {
//                ((android.view.ViewGroup) mParent).decrementChildUnhandledKeyListeners();
//            }
//        }
//    }
//
//    @Override
//    View dispatchUnhandledKeyEvent(KeyEvent evt) {
//        if (!hasUnhandledKeyListener()) {
//            return null;
//        }
//        ArrayList<View> orderedViews = buildOrderedChildList();
//        if (orderedViews != null) {
//            try {
//                for (int i = orderedViews.size() - 1; i >= 0; --i) {
//                    View v = orderedViews.get(i);
//                    View consumer = v.dispatchUnhandledKeyEvent(evt);
//                    if (consumer != null) {
//                        return consumer;
//                    }
//                }
//            } finally {
//                orderedViews.clear();
//            }
//        } else {
//            for (int i = getChildCount() - 1; i >= 0; --i) {
//                View v = getChildAt(i);
//                View consumer = v.dispatchUnhandledKeyEvent(evt);
//                if (consumer != null) {
//                    return consumer;
//                }
//            }
//        }
//        if (onUnhandledKeyEvent(evt)) {
//            return this;
//        }
//        return null;
//    }
//
//    /**
//     * LayoutParams are used by views to tell their parents how they want to be
//     * laid out. See
//     * {@link android.R.styleable#ViewGroup_Layout ViewGroup Layout Attributes}
//     * for a list of all child view attributes that this class supports.
//     *
//     * <p>
//     * The base LayoutParams class just describes how big the view wants to be
//     * for both width and height. For each dimension, it can specify one of:
//     * <ul>
//     * <li>FILL_PARENT (renamed MATCH_PARENT in API Level 8 and higher), which
//     * means that the view wants to be as big as its parent (minus padding)
//     * <li> WRAP_CONTENT, which means that the view wants to be just big enough
//     * to enclose its content (plus padding)
//     * <li> an exact number
//     * </ul>
//     * There are subclasses of LayoutParams for different subclasses of
//     * ViewGroup. For example, AbsoluteLayout has its own subclass of
//     * LayoutParams which adds an X and Y value.</p>
//     *
//     * <div class="special reference">
//     * <h3>Developer Guides</h3>
//     * <p>For more information about creating user interface layouts, read the
//     * <a href="{@docRoot}guide/topics/ui/declaring-layout.html">XML Layouts</a> developer
//     * guide.</p></div>
//     *
//     * @attr ref android.R.styleable#ViewGroup_Layout_layout_height
//     * @attr ref android.R.styleable#ViewGroup_Layout_layout_width
//     */
//    public static class LayoutParams {
//        /**
//         * Special value for the height or width requested by a View.
//         * FILL_PARENT means that the view wants to be as big as its parent,
//         * minus the parent's padding, if any. This value is deprecated
//         * starting in API Level 8 and replaced by {@link #MATCH_PARENT}.
//         */
//        @SuppressWarnings({"UnusedDeclaration"})
//        @Deprecated
//        public static final int FILL_PARENT = -1;
//
//        /**
//         * Special value for the height or width requested by a View.
//         * MATCH_PARENT means that the view wants to be as big as its parent,
//         * minus the parent's padding, if any. Introduced in API Level 8.
//         */
//        public static final int MATCH_PARENT = -1;
//
//        /**
//         * Special value for the height or width requested by a View.
//         * WRAP_CONTENT means that the view wants to be just large enough to fit
//         * its own internal content, taking its own padding into account.
//         */
//        public static final int WRAP_CONTENT = -2;
//
//        /**
//         * Information about how wide the view wants to be. Can be one of the
//         * constants FILL_PARENT (replaced by MATCH_PARENT
//         * in API Level 8) or WRAP_CONTENT, or an exact size.
//         */
//        @ViewDebug.ExportedProperty(category = "layout", mapping = {
//                @ViewDebug.IntToString(from = MATCH_PARENT, to = "MATCH_PARENT"),
//                @ViewDebug.IntToString(from = WRAP_CONTENT, to = "WRAP_CONTENT")
//        })
//        @InspectableProperty(name = "layout_width", enumMapping = {
//                @EnumEntry(name = "match_parent", value = MATCH_PARENT),
//                @EnumEntry(name = "wrap_content", value = WRAP_CONTENT)
//        })
//        public int width;
//
//        /**
//         * Information about how tall the view wants to be. Can be one of the
//         * constants FILL_PARENT (replaced by MATCH_PARENT
//         * in API Level 8) or WRAP_CONTENT, or an exact size.
//         */
//        @ViewDebug.ExportedProperty(category = "layout", mapping = {
//                @ViewDebug.IntToString(from = MATCH_PARENT, to = "MATCH_PARENT"),
//                @ViewDebug.IntToString(from = WRAP_CONTENT, to = "WRAP_CONTENT")
//        })
//        @InspectableProperty(name = "layout_height", enumMapping = {
//                @EnumEntry(name = "match_parent", value = MATCH_PARENT),
//                @EnumEntry(name = "wrap_content", value = WRAP_CONTENT)
//        })
//        public int height;
//
//        /**
//         * Used to animate layouts.
//         */
//        public LayoutAnimationController.AnimationParameters layoutAnimationParameters;
//
//        /**
//         * Creates a new set of layout parameters. The values are extracted from
//         * the supplied attributes set and context. The XML attributes mapped
//         * to this set of layout parameters are:
//         *
//         * <ul>
//         *   <li><code>layout_width</code>: the width, either an exact value,
//         *   {@link #WRAP_CONTENT}, or {@link #FILL_PARENT} (replaced by
//         *   {@link #MATCH_PARENT} in API Level 8)</li>
//         *   <li><code>layout_height</code>: the height, either an exact value,
//         *   {@link #WRAP_CONTENT}, or {@link #FILL_PARENT} (replaced by
//         *   {@link #MATCH_PARENT} in API Level 8)</li>
//         * </ul>
//         *
//         * @param c the application environment
//         * @param attrs the set of attributes from which to extract the layout
//         *              parameters' values
//         */
//        public LayoutParams(Context c, AttributeSet attrs) {
//            TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.ViewGroup_Layout);
//            setBaseAttributes(a,
//                    R.styleable.ViewGroup_Layout_layout_width,
//                    R.styleable.ViewGroup_Layout_layout_height);
//            a.recycle();
//        }
//
//        /**
//         * Creates a new set of layout parameters with the specified width
//         * and height.
//         *
//         * @param width the width, either {@link #WRAP_CONTENT},
//         *        {@link #FILL_PARENT} (replaced by {@link #MATCH_PARENT} in
//         *        API Level 8), or a fixed size in pixels
//         * @param height the height, either {@link #WRAP_CONTENT},
//         *        {@link #FILL_PARENT} (replaced by {@link #MATCH_PARENT} in
//         *        API Level 8), or a fixed size in pixels
//         */
//        public LayoutParams(int width, int height) {
//            this.width = width;
//            this.height = height;
//        }
//
//        /**
//         * Copy constructor. Clones the width and height values of the source.
//         *
//         * @param source The layout params to copy from.
//         */
//        public LayoutParams(android.view.ViewGroup.LayoutParams source) {
//            this.width = source.width;
//            this.height = source.height;
//        }
//
//        /**
//         * Used internally by MarginLayoutParams.
//         * @hide
//         */
//        @UnsupportedAppUsage
//        LayoutParams() {
//        }
//
//        /**
//         * Extracts the layout parameters from the supplied attributes.
//         *
//         * @param a the style attributes to extract the parameters from
//         * @param widthAttr the identifier of the width attribute
//         * @param heightAttr the identifier of the height attribute
//         */
//        protected void setBaseAttributes(TypedArray a, int widthAttr, int heightAttr) {
//            width = a.getLayoutDimension(widthAttr, "layout_width");
//            height = a.getLayoutDimension(heightAttr, "layout_height");
//        }
//
//        /**
//         * Resolve layout parameters depending on the layout direction. Subclasses that care about
//         * layoutDirection changes should override this method. The default implementation does
//         * nothing.
//         *
//         * @param layoutDirection the direction of the layout
//         *
//         * {@link View#LAYOUT_DIRECTION_LTR}
//         * {@link View#LAYOUT_DIRECTION_RTL}
//         */
//        public void resolveLayoutDirection(int layoutDirection) {
//        }
//
//        /**
//         * Returns a String representation of this set of layout parameters.
//         *
//         * @param output the String to prepend to the internal representation
//         * @return a String with the following format: output +
//         *         "ViewGroup.LayoutParams={ width=WIDTH, height=HEIGHT }"
//         *
//         * @hide
//         */
//        public String debug(String output) {
//            return output + "ViewGroup.LayoutParams={ width="
//                    + sizeToString(width) + ", height=" + sizeToString(height) + " }";
//        }
//
//        /**
//         * Use {@code canvas} to draw suitable debugging annotations for these LayoutParameters.
//         *
//         * @param view the view that contains these layout parameters
//         * @param canvas the canvas on which to draw
//         *
//         * @hide
//         */
//        public void onDebugDraw(View view, Canvas canvas, Paint paint) {
//        }
//
//        /**
//         * Converts the specified size to a readable String.
//         *
//         * @param size the size to convert
//         * @return a String instance representing the supplied size
//         *
//         * @hide
//         */
//        protected static String sizeToString(int size) {
//            if (size == WRAP_CONTENT) {
//                return "wrap-content";
//            }
//            if (size == MATCH_PARENT) {
//                return "match-parent";
//            }
//            return String.valueOf(size);
//        }
//
//        /** @hide */
//        void encode(@NonNull ViewHierarchyEncoder encoder) {
//            encoder.beginObject(this);
//            encodeProperties(encoder);
//            encoder.endObject();
//        }
//
//        /** @hide */
//        protected void encodeProperties(@NonNull ViewHierarchyEncoder encoder) {
//            encoder.addProperty("width", width);
//            encoder.addProperty("height", height);
//        }
//    }
//
//    /**
//     * Per-child layout information for layouts that support margins.
//     * See
//     * {@link android.R.styleable#ViewGroup_MarginLayout ViewGroup Margin Layout Attributes}
//     * for a list of all child view attributes that this class supports.
//     *
//     * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_margin
//     * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginHorizontal
//     * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginVertical
//     * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginLeft
//     * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginTop
//     * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginRight
//     * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginBottom
//     * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginStart
//     * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginEnd
//     */
//    public static class MarginLayoutParams extends android.view.ViewGroup.LayoutParams {
//        /**
//         * The left margin in pixels of the child. Margin values should be positive.
//         * Call {@link android.view.ViewGroup#setLayoutParams(android.view.ViewGroup.LayoutParams)} after reassigning a new value
//         * to this field.
//         */
//        @ViewDebug.ExportedProperty(category = "layout")
//        @InspectableProperty(name = "layout_marginLeft")
//        public int leftMargin;
//
//        /**
//         * The top margin in pixels of the child. Margin values should be positive.
//         * Call {@link android.view.ViewGroup#setLayoutParams(android.view.ViewGroup.LayoutParams)} after reassigning a new value
//         * to this field.
//         */
//        @ViewDebug.ExportedProperty(category = "layout")
//        @InspectableProperty(name = "layout_marginTop")
//        public int topMargin;
//
//        /**
//         * The right margin in pixels of the child. Margin values should be positive.
//         * Call {@link android.view.ViewGroup#setLayoutParams(android.view.ViewGroup.LayoutParams)} after reassigning a new value
//         * to this field.
//         */
//        @ViewDebug.ExportedProperty(category = "layout")
//        @InspectableProperty(name = "layout_marginRight")
//        public int rightMargin;
//
//        /**
//         * The bottom margin in pixels of the child. Margin values should be positive.
//         * Call {@link android.view.ViewGroup#setLayoutParams(android.view.ViewGroup.LayoutParams)} after reassigning a new value
//         * to this field.
//         */
//        @ViewDebug.ExportedProperty(category = "layout")
//        @InspectableProperty(name = "layout_marginBottom")
//        public int bottomMargin;
//
//        /**
//         * The start margin in pixels of the child. Margin values should be positive.
//         * Call {@link android.view.ViewGroup#setLayoutParams(android.view.ViewGroup.LayoutParams)} after reassigning a new value
//         * to this field.
//         */
//        @ViewDebug.ExportedProperty(category = "layout")
//        @UnsupportedAppUsage
//        private int startMargin = DEFAULT_MARGIN_RELATIVE;
//
//        /**
//         * The end margin in pixels of the child. Margin values should be positive.
//         * Call {@link android.view.ViewGroup#setLayoutParams(android.view.ViewGroup.LayoutParams)} after reassigning a new value
//         * to this field.
//         */
//        @ViewDebug.ExportedProperty(category = "layout")
//        @UnsupportedAppUsage
//        private int endMargin = DEFAULT_MARGIN_RELATIVE;
//
//        /**
//         * The default start and end margin.
//         * @hide
//         */
//        public static final int DEFAULT_MARGIN_RELATIVE = Integer.MIN_VALUE;
//
//        /**
//         * Bit  0: layout direction
//         * Bit  1: layout direction
//         * Bit  2: left margin undefined
//         * Bit  3: right margin undefined
//         * Bit  4: is RTL compatibility mode
//         * Bit  5: need resolution
//         *
//         * Bit 6 to 7 not used
//         *
//         * @hide
//         */
//        @ViewDebug.ExportedProperty(category = "layout", flagMapping = {
//                @ViewDebug.FlagToString(mask = LAYOUT_DIRECTION_MASK,
//                        equals = LAYOUT_DIRECTION_MASK, name = "LAYOUT_DIRECTION"),
//                @ViewDebug.FlagToString(mask = LEFT_MARGIN_UNDEFINED_MASK,
//                        equals = LEFT_MARGIN_UNDEFINED_MASK, name = "LEFT_MARGIN_UNDEFINED_MASK"),
//                @ViewDebug.FlagToString(mask = RIGHT_MARGIN_UNDEFINED_MASK,
//                        equals = RIGHT_MARGIN_UNDEFINED_MASK, name = "RIGHT_MARGIN_UNDEFINED_MASK"),
//                @ViewDebug.FlagToString(mask = RTL_COMPATIBILITY_MODE_MASK,
//                        equals = RTL_COMPATIBILITY_MODE_MASK, name = "RTL_COMPATIBILITY_MODE_MASK"),
//                @ViewDebug.FlagToString(mask = NEED_RESOLUTION_MASK,
//                        equals = NEED_RESOLUTION_MASK, name = "NEED_RESOLUTION_MASK")
//        }, formatToHexString = true)
//        byte mMarginFlags;
//
//        private static final int LAYOUT_DIRECTION_MASK = 0x00000003;
//        private static final int LEFT_MARGIN_UNDEFINED_MASK = 0x00000004;
//        private static final int RIGHT_MARGIN_UNDEFINED_MASK = 0x00000008;
//        private static final int RTL_COMPATIBILITY_MODE_MASK = 0x00000010;
//        private static final int NEED_RESOLUTION_MASK = 0x00000020;
//
//        private static final int DEFAULT_MARGIN_RESOLVED = 0;
//        private static final int UNDEFINED_MARGIN = DEFAULT_MARGIN_RELATIVE;
//
//        /**
//         * Creates a new set of layout parameters. The values are extracted from
//         * the supplied attributes set and context.
//         *
//         * @param c the application environment
//         * @param attrs the set of attributes from which to extract the layout
//         *              parameters' values
//         */
//        public MarginLayoutParams(Context c, AttributeSet attrs) {
//            super();
//
//            TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.ViewGroup_MarginLayout);
//            setBaseAttributes(a,
//                    R.styleable.ViewGroup_MarginLayout_layout_width,
//                    R.styleable.ViewGroup_MarginLayout_layout_height);
//
//            int margin = a.getDimensionPixelSize(
//                    com.android.internal.R.styleable.ViewGroup_MarginLayout_layout_margin, -1);
//            if (margin >= 0) {
//                leftMargin = margin;
//                topMargin = margin;
//                rightMargin= margin;
//                bottomMargin = margin;
//            } else {
//                int horizontalMargin = a.getDimensionPixelSize(
//                        R.styleable.ViewGroup_MarginLayout_layout_marginHorizontal, -1);
//                int verticalMargin = a.getDimensionPixelSize(
//                        R.styleable.ViewGroup_MarginLayout_layout_marginVertical, -1);
//
//                if (horizontalMargin >= 0) {
//                    leftMargin = horizontalMargin;
//                    rightMargin = horizontalMargin;
//                } else {
//                    leftMargin = a.getDimensionPixelSize(
//                            R.styleable.ViewGroup_MarginLayout_layout_marginLeft,
//                            UNDEFINED_MARGIN);
//                    if (leftMargin == UNDEFINED_MARGIN) {
//                        mMarginFlags |= LEFT_MARGIN_UNDEFINED_MASK;
//                        leftMargin = DEFAULT_MARGIN_RESOLVED;
//                    }
//                    rightMargin = a.getDimensionPixelSize(
//                            R.styleable.ViewGroup_MarginLayout_layout_marginRight,
//                            UNDEFINED_MARGIN);
//                    if (rightMargin == UNDEFINED_MARGIN) {
//                        mMarginFlags |= RIGHT_MARGIN_UNDEFINED_MASK;
//                        rightMargin = DEFAULT_MARGIN_RESOLVED;
//                    }
//                }
//
//                startMargin = a.getDimensionPixelSize(
//                        R.styleable.ViewGroup_MarginLayout_layout_marginStart,
//                        DEFAULT_MARGIN_RELATIVE);
//                endMargin = a.getDimensionPixelSize(
//                        R.styleable.ViewGroup_MarginLayout_layout_marginEnd,
//                        DEFAULT_MARGIN_RELATIVE);
//
//                if (verticalMargin >= 0) {
//                    topMargin = verticalMargin;
//                    bottomMargin = verticalMargin;
//                } else {
//                    topMargin = a.getDimensionPixelSize(
//                            R.styleable.ViewGroup_MarginLayout_layout_marginTop,
//                            DEFAULT_MARGIN_RESOLVED);
//                    bottomMargin = a.getDimensionPixelSize(
//                            R.styleable.ViewGroup_MarginLayout_layout_marginBottom,
//                            DEFAULT_MARGIN_RESOLVED);
//                }
//
//                if (isMarginRelative()) {
//                    mMarginFlags |= NEED_RESOLUTION_MASK;
//                }
//            }
//
//            final boolean hasRtlSupport = c.getApplicationInfo().hasRtlSupport();
//            final int targetSdkVersion = c.getApplicationInfo().targetSdkVersion;
//            if (targetSdkVersion < JELLY_BEAN_MR1 || !hasRtlSupport) {
//                mMarginFlags |= RTL_COMPATIBILITY_MODE_MASK;
//            }
//
//            // Layout direction is LTR by default
//            mMarginFlags |= LAYOUT_DIRECTION_LTR;
//
//            a.recycle();
//        }
//
//        public MarginLayoutParams(int width, int height) {
//            super(width, height);
//
//            mMarginFlags |= LEFT_MARGIN_UNDEFINED_MASK;
//            mMarginFlags |= RIGHT_MARGIN_UNDEFINED_MASK;
//
//            mMarginFlags &= ~NEED_RESOLUTION_MASK;
//            mMarginFlags &= ~RTL_COMPATIBILITY_MODE_MASK;
//        }
//
//        /**
//         * Copy constructor. Clones the width, height and margin values of the source.
//         *
//         * @param source The layout params to copy from.
//         */
//        public MarginLayoutParams(android.view.ViewGroup.MarginLayoutParams source) {
//            this.width = source.width;
//            this.height = source.height;
//
//            this.leftMargin = source.leftMargin;
//            this.topMargin = source.topMargin;
//            this.rightMargin = source.rightMargin;
//            this.bottomMargin = source.bottomMargin;
//            this.startMargin = source.startMargin;
//            this.endMargin = source.endMargin;
//
//            this.mMarginFlags = source.mMarginFlags;
//        }
//
//        public MarginLayoutParams(android.view.ViewGroup.LayoutParams source) {
//            super(source);
//
//            mMarginFlags |= LEFT_MARGIN_UNDEFINED_MASK;
//            mMarginFlags |= RIGHT_MARGIN_UNDEFINED_MASK;
//
//            mMarginFlags &= ~NEED_RESOLUTION_MASK;
//            mMarginFlags &= ~RTL_COMPATIBILITY_MODE_MASK;
//        }
//
//        /**
//         * @hide Used internally.
//         */
//        public final void copyMarginsFrom(android.view.ViewGroup.MarginLayoutParams source) {
//            this.leftMargin = source.leftMargin;
//            this.topMargin = source.topMargin;
//            this.rightMargin = source.rightMargin;
//            this.bottomMargin = source.bottomMargin;
//            this.startMargin = source.startMargin;
//            this.endMargin = source.endMargin;
//
//            this.mMarginFlags = source.mMarginFlags;
//        }
//
//        /**
//         * Sets the margins, in pixels. A call to {@link View#requestLayout()} needs
//         * to be done so that the new margins are taken into account. Left and right margins may be
//         * overridden by {@link View#requestLayout()} depending on layout direction.
//         * Margin values should be positive.
//         *
//         * @param left the left margin size
//         * @param top the top margin size
//         * @param right the right margin size
//         * @param bottom the bottom margin size
//         *
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginLeft
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginTop
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginRight
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginBottom
//         */
//        public void setMargins(int left, int top, int right, int bottom) {
//            leftMargin = left;
//            topMargin = top;
//            rightMargin = right;
//            bottomMargin = bottom;
//            mMarginFlags &= ~LEFT_MARGIN_UNDEFINED_MASK;
//            mMarginFlags &= ~RIGHT_MARGIN_UNDEFINED_MASK;
//            if (isMarginRelative()) {
//                mMarginFlags |= NEED_RESOLUTION_MASK;
//            } else {
//                mMarginFlags &= ~NEED_RESOLUTION_MASK;
//            }
//        }
//
//        /**
//         * Sets the relative margins, in pixels. A call to {@link View#requestLayout()}
//         * needs to be done so that the new relative margins are taken into account. Left and right
//         * margins may be overridden by {@link View#requestLayout()} depending on
//         * layout direction. Margin values should be positive.
//         *
//         * @param start the start margin size
//         * @param top the top margin size
//         * @param end the right margin size
//         * @param bottom the bottom margin size
//         *
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginStart
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginTop
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginEnd
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginBottom
//         *
//         * @hide
//         */
//        @UnsupportedAppUsage
//        public void setMarginsRelative(int start, int top, int end, int bottom) {
//            startMargin = start;
//            topMargin = top;
//            endMargin = end;
//            bottomMargin = bottom;
//            mMarginFlags |= NEED_RESOLUTION_MASK;
//        }
//
//        /**
//         * Sets the relative start margin. Margin values should be positive.
//         *
//         * @param start the start margin size
//         *
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginStart
//         */
//        public void setMarginStart(int start) {
//            startMargin = start;
//            mMarginFlags |= NEED_RESOLUTION_MASK;
//        }
//
//        /**
//         * Returns the start margin in pixels.
//         *
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginStart
//         *
//         * @return the start margin in pixels.
//         */
//        public int getMarginStart() {
//            if (startMargin != DEFAULT_MARGIN_RELATIVE) return startMargin;
//            if ((mMarginFlags & NEED_RESOLUTION_MASK) == NEED_RESOLUTION_MASK) {
//                doResolveMargins();
//            }
//            switch(mMarginFlags & LAYOUT_DIRECTION_MASK) {
//                case View.LAYOUT_DIRECTION_RTL:
//                    return rightMargin;
//                case View.LAYOUT_DIRECTION_LTR:
//                default:
//                    return leftMargin;
//            }
//        }
//
//        /**
//         * Sets the relative end margin. Margin values should be positive.
//         *
//         * @param end the end margin size
//         *
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginEnd
//         */
//        public void setMarginEnd(int end) {
//            endMargin = end;
//            mMarginFlags |= NEED_RESOLUTION_MASK;
//        }
//
//        /**
//         * Returns the end margin in pixels.
//         *
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginEnd
//         *
//         * @return the end margin in pixels.
//         */
//        public int getMarginEnd() {
//            if (endMargin != DEFAULT_MARGIN_RELATIVE) return endMargin;
//            if ((mMarginFlags & NEED_RESOLUTION_MASK) == NEED_RESOLUTION_MASK) {
//                doResolveMargins();
//            }
//            switch(mMarginFlags & LAYOUT_DIRECTION_MASK) {
//                case View.LAYOUT_DIRECTION_RTL:
//                    return leftMargin;
//                case View.LAYOUT_DIRECTION_LTR:
//                default:
//                    return rightMargin;
//            }
//        }
//
//        /**
//         * Check if margins are relative.
//         *
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginStart
//         * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginEnd
//         *
//         * @return true if either marginStart or marginEnd has been set.
//         */
//        public boolean isMarginRelative() {
//            return (startMargin != DEFAULT_MARGIN_RELATIVE || endMargin != DEFAULT_MARGIN_RELATIVE);
//        }
//
//        /**
//         * Set the layout direction
//         * @param layoutDirection the layout direction.
//         *        Should be either {@link View#LAYOUT_DIRECTION_LTR}
//         *                     or {@link View#LAYOUT_DIRECTION_RTL}.
//         */
//        public void setLayoutDirection(int layoutDirection) {
//            if (layoutDirection != View.LAYOUT_DIRECTION_LTR &&
//                    layoutDirection != View.LAYOUT_DIRECTION_RTL) return;
//            if (layoutDirection != (mMarginFlags & LAYOUT_DIRECTION_MASK)) {
//                mMarginFlags &= ~LAYOUT_DIRECTION_MASK;
//                mMarginFlags |= (layoutDirection & LAYOUT_DIRECTION_MASK);
//                if (isMarginRelative()) {
//                    mMarginFlags |= NEED_RESOLUTION_MASK;
//                } else {
//                    mMarginFlags &= ~NEED_RESOLUTION_MASK;
//                }
//            }
//        }
//
//        /**
//         * Retuns the layout direction. Can be either {@link View#LAYOUT_DIRECTION_LTR} or
//         * {@link View#LAYOUT_DIRECTION_RTL}.
//         *
//         * @return the layout direction.
//         */
//        public int getLayoutDirection() {
//            return (mMarginFlags & LAYOUT_DIRECTION_MASK);
//        }
//
//        /**
//         * This will be called by {@link View#requestLayout()}. Left and Right margins
//         * may be overridden depending on layout direction.
//         */
//        @Override
//        public void resolveLayoutDirection(int layoutDirection) {
//            setLayoutDirection(layoutDirection);
//
//            // No relative margin or pre JB-MR1 case or no need to resolve, just dont do anything
//            // Will use the left and right margins if no relative margin is defined.
//            if (!isMarginRelative() ||
//                    (mMarginFlags & NEED_RESOLUTION_MASK) != NEED_RESOLUTION_MASK) return;
//
//            // Proceed with resolution
//            doResolveMargins();
//        }
//
//        private void doResolveMargins() {
//            if ((mMarginFlags & RTL_COMPATIBILITY_MODE_MASK) == RTL_COMPATIBILITY_MODE_MASK) {
//                // if left or right margins are not defined and if we have some start or end margin
//                // defined then use those start and end margins.
//                if ((mMarginFlags & LEFT_MARGIN_UNDEFINED_MASK) == LEFT_MARGIN_UNDEFINED_MASK
//                        && startMargin > DEFAULT_MARGIN_RELATIVE) {
//                    leftMargin = startMargin;
//                }
//                if ((mMarginFlags & RIGHT_MARGIN_UNDEFINED_MASK) == RIGHT_MARGIN_UNDEFINED_MASK
//                        && endMargin > DEFAULT_MARGIN_RELATIVE) {
//                    rightMargin = endMargin;
//                }
//            } else {
//                // We have some relative margins (either the start one or the end one or both). So use
//                // them and override what has been defined for left and right margins. If either start
//                // or end margin is not defined, just set it to default "0".
//                switch(mMarginFlags & LAYOUT_DIRECTION_MASK) {
//                    case View.LAYOUT_DIRECTION_RTL:
//                        leftMargin = (endMargin > DEFAULT_MARGIN_RELATIVE) ?
//                                endMargin : DEFAULT_MARGIN_RESOLVED;
//                        rightMargin = (startMargin > DEFAULT_MARGIN_RELATIVE) ?
//                                startMargin : DEFAULT_MARGIN_RESOLVED;
//                        break;
//                    case View.LAYOUT_DIRECTION_LTR:
//                    default:
//                        leftMargin = (startMargin > DEFAULT_MARGIN_RELATIVE) ?
//                                startMargin : DEFAULT_MARGIN_RESOLVED;
//                        rightMargin = (endMargin > DEFAULT_MARGIN_RELATIVE) ?
//                                endMargin : DEFAULT_MARGIN_RESOLVED;
//                        break;
//                }
//            }
//            mMarginFlags &= ~NEED_RESOLUTION_MASK;
//        }
//
//        /**
//         * @hide
//         */
//        public boolean isLayoutRtl() {
//            return ((mMarginFlags & LAYOUT_DIRECTION_MASK) == View.LAYOUT_DIRECTION_RTL);
//        }
//
//        /**
//         * @hide
//         */
//        @Override
//        public void onDebugDraw(View view, Canvas canvas, Paint paint) {
//            Insets oi = isLayoutModeOptical(view.mParent) ? view.getOpticalInsets() : Insets.NONE;
//
//            fillDifference(canvas,
//                    view.getLeft()   + oi.left,
//                    view.getTop()    + oi.top,
//                    view.getRight()  - oi.right,
//                    view.getBottom() - oi.bottom,
//                    leftMargin,
//                    topMargin,
//                    rightMargin,
//                    bottomMargin,
//                    paint);
//        }
//
//        /** @hide */
//        @Override
//        protected void encodeProperties(@NonNull ViewHierarchyEncoder encoder) {
//            super.encodeProperties(encoder);
//            encoder.addProperty("leftMargin", leftMargin);
//            encoder.addProperty("topMargin", topMargin);
//            encoder.addProperty("rightMargin", rightMargin);
//            encoder.addProperty("bottomMargin", bottomMargin);
//            encoder.addProperty("startMargin", startMargin);
//            encoder.addProperty("endMargin", endMargin);
//        }
//    }
//
//    /* Describes a touched view and the ids of the pointers that it has captured.
//     *
//     * This code assumes that pointer ids are always in the range 0..31 such that
//     * it can use a bitfield to track which pointer ids are present.
//     * As it happens, the lower layers of the input dispatch pipeline also use the
//     * same trick so the assumption should be safe here...
//     */
//    private static final class TouchTarget {
//        private static final int MAX_RECYCLED = 32;
//        private static final Object sRecycleLock = new Object[0];
//        private static TouchTarget sRecycleBin;
//        private static int sRecycledCount;
//
//        public static final int ALL_POINTER_IDS = -1; // all ones
//
//        // The touched child view.
//        @UnsupportedAppUsage
//        public View child;
//
//        // The combined bit mask of pointer ids for all pointers captured by the target.
//        public int pointerIdBits;
//
//        // The next target in the target list.
//        public TouchTarget next;
//
//        @UnsupportedAppUsage
//        private TouchTarget() {
//        }
//
//        public static TouchTarget obtain(@NonNull View child, int pointerIdBits) {
//            if (child == null) {
//                throw new IllegalArgumentException("child must be non-null");
//            }
//
//            final TouchTarget target;
//            synchronized (sRecycleLock) {
//                if (sRecycleBin == null) {
//                    target = new TouchTarget();
//                } else {
//                    target = sRecycleBin;
//                    sRecycleBin = target.next;
//                    sRecycledCount--;
//                    target.next = null;
//                }
//            }
//            target.child = child;
//            target.pointerIdBits = pointerIdBits;
//            return target;
//        }
//
//        public void recycle() {
//            if (child == null) {
//                throw new IllegalStateException("already recycled once");
//            }
//
//            synchronized (sRecycleLock) {
//                if (sRecycledCount < MAX_RECYCLED) {
//                    next = sRecycleBin;
//                    sRecycleBin = this;
//                    sRecycledCount += 1;
//                } else {
//                    next = null;
//                }
//                child = null;
//            }
//        }
//    }
//
//    /* Describes a hovered view. */
//    private static final class HoverTarget {
//        private static final int MAX_RECYCLED = 32;
//        private static final Object sRecycleLock = new Object[0];
//        private static HoverTarget sRecycleBin;
//        private static int sRecycledCount;
//
//        // The hovered child view.
//        public View child;
//
//        // The next target in the target list.
//        public HoverTarget next;
//
//        private HoverTarget() {
//        }
//
//        public static HoverTarget obtain(@NonNull View child) {
//            if (child == null) {
//                throw new IllegalArgumentException("child must be non-null");
//            }
//
//            final HoverTarget target;
//            synchronized (sRecycleLock) {
//                if (sRecycleBin == null) {
//                    target = new HoverTarget();
//                } else {
//                    target = sRecycleBin;
//                    sRecycleBin = target.next;
//                    sRecycledCount--;
//                    target.next = null;
//                }
//            }
//            target.child = child;
//            return target;
//        }
//
//        public void recycle() {
//            if (child == null) {
//                throw new IllegalStateException("already recycled once");
//            }
//
//            synchronized (sRecycleLock) {
//                if (sRecycledCount < MAX_RECYCLED) {
//                    next = sRecycleBin;
//                    sRecycleBin = this;
//                    sRecycledCount += 1;
//                } else {
//                    next = null;
//                }
//                child = null;
//            }
//        }
//    }
//
//    /**
//     * Pooled class that to hold the children for autifill.
//     */
//    private static class ChildListForAutoFillOrContentCapture extends ArrayList<View> {
//        private static final int MAX_POOL_SIZE = 32;
//
//        private static final Pools.SimplePool<ChildListForAutoFillOrContentCapture> sPool =
//                new Pools.SimplePool<>(MAX_POOL_SIZE);
//
//        public static ChildListForAutoFillOrContentCapture obtain() {
//            ChildListForAutoFillOrContentCapture list = sPool.acquire();
//            if (list == null) {
//                list = new ChildListForAutoFillOrContentCapture();
//            }
//            return list;
//        }
//
//        public void recycle() {
//            clear();
//            sPool.release(this);
//        }
//    }
//
//    /**
//     * Pooled class that orderes the children of a ViewGroup from start
//     * to end based on how they are laid out and the layout direction.
//     */
//    static class ChildListForAccessibility {
//
//        private static final int MAX_POOL_SIZE = 32;
//
//        private static final SynchronizedPool<ChildListForAccessibility> sPool =
//                new SynchronizedPool<ChildListForAccessibility>(MAX_POOL_SIZE);
//
//        private final ArrayList<View> mChildren = new ArrayList<View>();
//
//        private final ArrayList<ViewLocationHolder> mHolders = new ArrayList<ViewLocationHolder>();
//
//        public static ChildListForAccessibility obtain(android.view.ViewGroup parent, boolean sort) {
//            ChildListForAccessibility list = sPool.acquire();
//            if (list == null) {
//                list = new ChildListForAccessibility();
//            }
//            list.init(parent, sort);
//            return list;
//        }
//
//        public void recycle() {
//            clear();
//            sPool.release(this);
//        }
//
//        public int getChildCount() {
//            return mChildren.size();
//        }
//
//        public View getChildAt(int index) {
//            return mChildren.get(index);
//        }
//
//        private void init(android.view.ViewGroup parent, boolean sort) {
//            ArrayList<View> children = mChildren;
//            final int childCount = parent.getChildCount();
//            for (int i = 0; i < childCount; i++) {
//                View child = parent.getChildAt(i);
//                children.add(child);
//            }
//            if (sort) {
//                ArrayList<ViewLocationHolder> holders = mHolders;
//                for (int i = 0; i < childCount; i++) {
//                    View child = children.get(i);
//                    ViewLocationHolder holder = ViewLocationHolder.obtain(parent, child);
//                    holders.add(holder);
//                }
//                sort(holders);
//                for (int i = 0; i < childCount; i++) {
//                    ViewLocationHolder holder = holders.get(i);
//                    children.set(i, holder.mView);
//                    holder.recycle();
//                }
//                holders.clear();
//            }
//        }
//
//        private void sort(ArrayList<ViewLocationHolder> holders) {
//            // This is gross but the least risky solution. The current comparison
//            // strategy breaks transitivity but produces very good results. Coming
//            // up with a new strategy requires time which we do not have, so ...
//            try {
//                ViewLocationHolder.setComparisonStrategy(
//                        ViewLocationHolder.COMPARISON_STRATEGY_STRIPE);
//                Collections.sort(holders);
//            } catch (IllegalArgumentException iae) {
//                // Note that in practice this occurs extremely rarely in a couple
//                // of pathological cases.
//                ViewLocationHolder.setComparisonStrategy(
//                        ViewLocationHolder.COMPARISON_STRATEGY_LOCATION);
//                Collections.sort(holders);
//            }
//        }
//
//        private void clear() {
//            mChildren.clear();
//        }
//    }
//
//    /**
//     * Pooled class that holds a View and its location with respect to
//     * a specified root. This enables sorting of views based on their
//     * coordinates without recomputing the position relative to the root
//     * on every comparison.
//     */
//    static class ViewLocationHolder implements Comparable<ViewLocationHolder> {
//
//        private static final int MAX_POOL_SIZE = 32;
//
//        private static final SynchronizedPool<ViewLocationHolder> sPool =
//                new SynchronizedPool<ViewLocationHolder>(MAX_POOL_SIZE);
//
//        public static final int COMPARISON_STRATEGY_STRIPE = 1;
//
//        public static final int COMPARISON_STRATEGY_LOCATION = 2;
//
//        private static int sComparisonStrategy = COMPARISON_STRATEGY_STRIPE;
//
//        private final Rect mLocation = new Rect();
//
//        private android.view.ViewGroup mRoot;
//
//        public View mView;
//
//        private int mLayoutDirection;
//
//        public static ViewLocationHolder obtain(android.view.ViewGroup root, View view) {
//            ViewLocationHolder holder = sPool.acquire();
//            if (holder == null) {
//                holder = new ViewLocationHolder();
//            }
//            holder.init(root, view);
//            return holder;
//        }
//
//        public static void setComparisonStrategy(int strategy) {
//            sComparisonStrategy = strategy;
//        }
//
//        public void recycle() {
//            clear();
//            sPool.release(this);
//        }
//
//        @Override
//        public int compareTo(ViewLocationHolder another) {
//            // This instance is greater than an invalid argument.
//            if (another == null) {
//                return 1;
//            }
//
//            int boundsResult = compareBoundsOfTree(this, another);
//            if (boundsResult != 0) {
//                return boundsResult;
//            }
//
//            // Just break the tie somehow. The accessibility ids are unique
//            // and stable, hence this is deterministic tie breaking.
//            return mView.getAccessibilityViewId() - another.mView.getAccessibilityViewId();
//        }
//
//        /**
//         * Compare two views based on their bounds. Use the bounds of their children to break ties.
//         *
//         * @param holder1 Holder of first view to compare
//         * @param holder2 Holder of second view to compare. Must have the same root as holder1.
//         * @return The compare result, with equality if no good comparison was found.
//         */
//        private static int compareBoundsOfTree(
//                ViewLocationHolder holder1, ViewLocationHolder holder2) {
//            if (sComparisonStrategy == COMPARISON_STRATEGY_STRIPE) {
//                // First is above second.
//                if (holder1.mLocation.bottom - holder2.mLocation.top <= 0) {
//                    return -1;
//                }
//                // First is below second.
//                if (holder1.mLocation.top - holder2.mLocation.bottom >= 0) {
//                    return 1;
//                }
//            }
//
//            // We are ordering left-to-right, top-to-bottom.
//            if (holder1.mLayoutDirection == LAYOUT_DIRECTION_LTR) {
//                final int leftDifference = holder1.mLocation.left - holder2.mLocation.left;
//                if (leftDifference != 0) {
//                    return leftDifference;
//                }
//            } else { // RTL
//                final int rightDifference = holder1.mLocation.right - holder2.mLocation.right;
//                if (rightDifference != 0) {
//                    return -rightDifference;
//                }
//            }
//            // We are ordering left-to-right, top-to-bottom.
//            final int topDifference = holder1.mLocation.top - holder2.mLocation.top;
//            if (topDifference != 0) {
//                return topDifference;
//            }
//            // Break tie by height.
//            final int heightDiference = holder1.mLocation.height() - holder2.mLocation.height();
//            if (heightDiference != 0) {
//                return -heightDiference;
//            }
//            // Break tie by width.
//            final int widthDifference = holder1.mLocation.width() - holder2.mLocation.width();
//            if (widthDifference != 0) {
//                return -widthDifference;
//            }
//
//            // Find a child of each view with different screen bounds.
//            final Rect view1Bounds = new Rect();
//            final Rect view2Bounds = new Rect();
//            final Rect tempRect = new Rect();
//            holder1.mView.getBoundsOnScreen(view1Bounds, true);
//            holder2.mView.getBoundsOnScreen(view2Bounds, true);
//            final View child1 = holder1.mView.findViewByPredicateTraversal((view) -> {
//                view.getBoundsOnScreen(tempRect, true);
//                return !tempRect.equals(view1Bounds);
//            }, null);
//            final View child2 = holder2.mView.findViewByPredicateTraversal((view) -> {
//                view.getBoundsOnScreen(tempRect, true);
//                return !tempRect.equals(view2Bounds);
//            }, null);
//
//
//            // Compare the children recursively
//            if ((child1 != null) && (child2 != null)) {
//                final ViewLocationHolder childHolder1 =
//                        ViewLocationHolder.obtain(holder1.mRoot, child1);
//                final ViewLocationHolder childHolder2 =
//                        ViewLocationHolder.obtain(holder1.mRoot, child2);
//                return compareBoundsOfTree(childHolder1, childHolder2);
//            }
//
//            // If only one has a child, use that one
//            if (child1 != null) {
//                return 1;
//            }
//
//            if (child2 != null) {
//                return -1;
//            }
//
//            // Give up
//            return 0;
//        }
//
//        private void init(android.view.ViewGroup root, View view) {
//            Rect viewLocation = mLocation;
//            view.getDrawingRect(viewLocation);
//            root.offsetDescendantRectToMyCoords(view, viewLocation);
//            mView = view;
//            mRoot = root;
//            mLayoutDirection = root.getLayoutDirection();
//        }
//
//        private void clear() {
//            mView = null;
//            mRoot = null;
//            mLocation.set(0, 0, 0, 0);
//        }
//    }
//
//    private static void drawRect(Canvas canvas, Paint paint, int x1, int y1, int x2, int y2) {
//        if (sDebugLines== null) {
//            // TODO: This won't work with multiple UI threads in a single process
//            sDebugLines = new float[16];
//        }
//
//        sDebugLines[0] = x1;
//        sDebugLines[1] = y1;
//        sDebugLines[2] = x2;
//        sDebugLines[3] = y1;
//
//        sDebugLines[4] = x2;
//        sDebugLines[5] = y1;
//        sDebugLines[6] = x2;
//        sDebugLines[7] = y2;
//
//        sDebugLines[8] = x2;
//        sDebugLines[9] = y2;
//        sDebugLines[10] = x1;
//        sDebugLines[11] = y2;
//
//        sDebugLines[12] = x1;
//        sDebugLines[13] = y2;
//        sDebugLines[14] = x1;
//        sDebugLines[15] = y1;
//
//        canvas.drawLines(sDebugLines, paint);
//    }
//
//    /** @hide */
//    @Override
//    @UnsupportedAppUsage
//    protected void encodeProperties(@NonNull ViewHierarchyEncoder encoder) {
//        super.encodeProperties(encoder);
//
//        encoder.addProperty("focus:descendantFocusability", getDescendantFocusability());
//        encoder.addProperty("drawing:clipChildren", getClipChildren());
//        encoder.addProperty("drawing:clipToPadding", getClipToPadding());
//        encoder.addProperty("drawing:childrenDrawingOrderEnabled", isChildrenDrawingOrderEnabled());
//        encoder.addProperty("drawing:persistentDrawingCache", getPersistentDrawingCache());
//
//        int n = getChildCount();
//        encoder.addProperty("meta:__childCount__", (short)n);
//        for (int i = 0; i < n; i++) {
//            encoder.addPropertyKey("meta:__child__" + i);
//            getChildAt(i).encode(encoder);
//        }
//    }
//
//    /** @hide */
//    @Override
//    public final void onDescendantUnbufferedRequested() {
//        // First look at the focused child for focused events
//        int focusedChildNonPointerSource = InputDevice.SOURCE_CLASS_NONE;
//        if (mFocused != null) {
//            focusedChildNonPointerSource = mFocused.mUnbufferedInputSource
//                    & (~InputDevice.SOURCE_CLASS_POINTER);
//        }
//        mUnbufferedInputSource = focusedChildNonPointerSource;
//
//        // Request unbuffered dispatch for pointer events for this view if any child requested
//        // unbuffered dispatch for pointer events. This is because we can't expect that the pointer
//        // source would dispatch to the focused view.
//        for (int i = 0; i < mChildrenCount; i++) {
//            final View child = mChildren[i];
//            if ((child.mUnbufferedInputSource & InputDevice.SOURCE_CLASS_POINTER) != 0) {
//                mUnbufferedInputSource |= InputDevice.SOURCE_CLASS_POINTER;
//                break;
//            }
//        }
//        if (mParent != null) {
//            mParent.onDescendantUnbufferedRequested();
//        }
//    }
//}
//
